?what we know ????Gunman Omar Mateen, a U.S. citizen born to Afghani parents, opened fire at Pulse Nightclub in Orlando, Florida, killing 49 people. It is the worst mass shooting in U.S. history. Mateen was killed in a shootout with local law enforcement. Fifty-three people were wounded in the attack and are being treated at area hospitals. Mateen pledged his support to ISIS, which claimed responsibility for the attack in a radio statement.? ?Mateen was previously investigated by the FBI for possible terrorist ties, but agents were unable to verify any terrorist links at the time. Orlando has created a website (cityoforlando.net/victims?) that will be updated with the names of the deceased after their next of kin is notified. Family members looking to check on missing family members can call a City of Orlando hotline at 407-246-4357 for information. Anyone with information about the shooting is asked to call law enforcement at 1-800-CALL-FBI.?FBI requests information on orlando gunmanUPDATE 4:50 p.m. ET, 15 June 2016????The FBI is seeking information on Orlando gunman Omar Mateen, asking anyone with information about the Pulse nightclub shooter to contact the bureau.??United states issues new terrorism bulletinUPDATE�4:25 p.m. ET, 15 June 2016The Obama administration issued a new terrorism bulletin? on Wednesday, warning Americans about attacks from homegrown extremists."In this environment, we are particularly concerned about homegrown violent extremists who could strike with little or no notice," said the U.S. Department of Homeland Security (DHS) in the bulletin. "The tragic events of Orlando several days ago reinforce this."DHS recommends increased public vigilance and awareness for the duration of the bulletin, which expires November 15, 2016, just before the holiday season. A bulletin is used to describe current developments or general trends regarding threats of terrorism, and this marks the second occassion that DHS has issued one.�

"Though we know of no intelligence that is both specific and credible at this time of a plot by terrorist organizations to attack the homeland, the reality is terrorist-inspired individuals have conducted, or attempted to conduct, attacks in the United States," the bulletin explained. "DHS is especially concerned that terrorist-inspired individuals and homegrown violent extremists may be encouraged or inspired to target public events or places."

DHS is also concerned about threats and violence directed at specific communities and individuals based on "perceived religion, ethnicity, nationality, or sexual orientation," the bulletin said.Expert: Pulse Nightclub Attack Changes the Game for soft Target security

UPDATE 5:45 p.m. ET, 14 June 2016

After news broke of the shooting at Pulse nightclub in Orlando in the early hours of Sunday morning, many were left wondering what could have been done to prevent the attack that left 50 people dead�including the gunman�and wounded 53 others.�

To find out and to discuss what this latest attack on a soft targetmeans for the security industry, Security Management Assistant Editor Megan Gates spoke with subject matter expert Kevin Doss, CPP, PSP.�

Doss is president and CEO of Level 4 Security, a security consultancy, and author of Active Shooter: Preparing ?for and Responding to a Growing Threat.?

Read their conversation by following this link: "What the Pulse Nightclub Attack Means for Soft Target Security.?"?Obama explains stance on avoiding�using term 'radical islam'

UPDATE 2:00 p.m. ET, 14 June 2016

President Barack Obama rejected criticism from other government officials over his refusal to use the term "radical Islam" to describe ISIS.�

"If there's anyone out there who thinks we're confused about who our enemies are, that would come as a surprise to the thousands of terrorists who we've taken off the battlefield," Obama said in a statement at the U.S. Treasury Department Tuesday afternoon. "There's no magic to the phrase 'radical Islam.' It's a political talking point; it's not a strategy."????????????

??

Instead, Obama explained that he avoids using the term because it furthers terrorist organization's goals if he does.

"Groups like ISIL and al Qaeda want to make this a war between Islam and America, or Islam and the West," Obama said. "They want to claim that they are the true leaders of over a billion Muslims around the world who reject their crazy notions...they want us to validate them by implying that they speak for those billion plus people. That they speak for Islam. That's their propaganda. That's how they recruit."

"If we fall into the trap of painting all Muslims with a broad brush, and imply that we're at war with an entire religion, then we're doing the terrorists' work for them," Obama added.

The president gave the statement following a briefing with national security advisors and cabinet members on what's being done to defeat ISIS. The briefing was scheduled prior to the Orlando attack, which Obama said was discussed.

He reiterated FBI Director James Comey's assessment from Monday that there is no information to indicate that the Orlando gunman, Omar Mateen, was directed by a foreign terrorist group to attack the Pulse nightclub.�

However, Obama said it is "increasingly clear that [Mateen] took in extremist information over the Internet" and was an angry and unstable man.

"These lone actors or small cells of terrorists are very hard to detect and very hard to prevent," Obama explained. "But across our government...we are doing everything in our power to stop these kinds of attacks. We work to succeed 100 percent of the time. An attacker, as we saw in Orlando, only has to succeed once."DHS Secretary: Gun control 'part and parcel' of national security

UPDATE 10:45 a.m. ET, 14 June 2016

Gun control is "part and parcel" of national security, said U.S. Department of Homeland Security (DHS) Secretary Jeh Johnson in an appearance on CBS's "This Morning" show.

"I think that we have to face the facts that gun control is part and parcel of homeland security, given how things are evolving," Johnson explained.�???

???

?

?Johnson saidCongress must pass meaningful gun control laws, an effort that he explained he was surprised legislators hadn't taken up following the Sandy Hook elementary massacre in 2012.

"I thought, frankly, after Sandy Hook, where you have school children murdered in a classroom that maybe finally this w?as going to be the tipping point," Johnson said. "And we were not able to move the needle in Congress, unfortunately."Resources for additional information

UPDATE 5:05 p.m. ET, 13 June 2016

?Security Management is signing off from updating this live blog for the evening. For breaking news and live updates, check out the following resources:

?Security Management's Twitter Feed

The New York Times Live BlogThe Orlando Police Department Twitter Feed

The Orlando Sentinel's Twitter Feed

Orlando Mayor Dyer's Blog

equality florida to hold community vigil in orlando�tonight

UPDATE 4:10 p.m. ET, 13 June 2016

?Equality Florida plans to hold a community vigil in Orlando this evening at 7:00 p.m. on the Seneff Arts Plaza at the Dr. Phillips Center for the Performing Arts.

??Equality Florida consists of two organizations--Equality Florida Institute, Inc, and Equality Florida Action, Inc.--which form the largest civil rights organization dedicated to securing full equality for Florida's lesbian, gay, bisexual, and transgender community.

"Equality Florida has been working closely with the city and federal government to ensure this will be a safe event for those who come out to mourn the victims of the horrific mass shooting at Pulse nightclub," the organization said in astatement on its website.? "We are asking the community to come together to remember and honor the victims, families, and friends affected by this national tragedy. Let's show the world that we are #OneOrlando."

The city of Orlando, however, is asking that mass gatherings in public places are not created.�

"The outpouring of support for the Orlando community has been tremendous," the city said on its official Twitter feed. "The City of Orlando appreciates all Orlando residents, community organizations, and business owners who are planning individual events. The city is asking that as these are planned, that mass gatherings in public places are not created. Instead, the city asks that these events are coordinated in places of worship, private community gathering spaces, and other appropriate locations for these smaller gatherings."?

Gunman legally purchased firearms used in orlando shooting

UPDATE 2:35 p.m. ET, 13 June 2016

Omar Mateen legally purchased the firearms he used to open fire at Pulse nightclub, killing 49 people and wounding 53 others.�

In a joint press conference on Sunday, the FBI and the Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF) confirmed Mateen legally walked intoSt. Lucie Shooting Center ?and purchased two individual firearms within the last week: a handgun and a long gun.?�

?

??

????Rolling Stone recentlyconfirmed that Mateen used a 9mm handgun and a .223 caliber AR-15-style semi-automatic rifle to carry out his attack on Pulse.�

Mateen was�licensed to carry a concealed weapon in Florida, and there is a three-day waiting period to purchase a handgun in the state.�However, he did not require a license to�carry the AR-15, and there is no waiting period to purchase one.

"The AR-15 is one of the most popular, and most easily obtained, guns in America," according to Rolling Stone. "In 2013, the National Shooting Sports Foundation estimated there are somewhere between 5 million and 8.2 million assault weapons in circulation."

The AR-15 has been used in multiple recent mass shootings, including the 2015 San Bernardino shooting; the 2015 community college shooting in Roseburg, Oregon;�the 2012 Sandy Hook shooting; and the 2012 Aurora, Colorado, shooting.FBI Director: Gunman likely radicalized over the internet

UPDATE 1:00 p.m. ET, 13 June 2016

The FBI is highly confident that Orlando gunman Omar Mateen was radicalized in some part through the Internet, said FBI Director James Comey in a statement Monday afternoon.�

However, Comey said it is unclear what terrorist network Mateen supported. This is because while Mateen pledged support to ISIL in a 911 phone call, he also pledged solidarity with the Boston Marathon bombers and�Moner Mohammad Abusalha?--who were not inspired by ISIL--adding "confusion to his motives," Comey said.

The FBI is leading the investigation into the Orlando attack and Mateen's motives with the help of local and state law enforcement partners.�

Comey also used his statement to clarify Mateen's previous contact with the FBI, which first became aware of him in 2013 when he was a contract security guard working at a local court house.

The FBI investigated Mateen at that time, Comey explained, because his coworkers reported that Mateen claimed family connections to al Qaeda. Mateen also allegedly said he was a member of Hezbollah and that he hoped law enforcement would raid his apartment, and�assault his wife and child so he could become a martyr.

To investigate Mateen's remarks, the FBI introduced confidential sources, recorded him, followed him, reviewed transactions from his communications, and interviewed him twice. During those interviews, Mateen admitted making the alleged statements to his coworkers.�

But, he said they were made "in anger because he thought his coworkers were discriminating against him because he was Muslim," Comey said.

After closing that investigation, two months later in 2013 the FBI became aware that Mateen and Abusalha had attended the same mosque in Florida. The bureau looked into Mateen again, but found no ties between the two individuals of any consequence, and refocused its investigation on Abusalha.

As part of its current investigation, Comey said the FBI will reexamine its work to see if any errors were made. "So far, the honest answer is 'I don't think so,'" Comey added.Expert: take a proactive approach to venue security

UPDATE 12:30 p.m. ET, 13 June 2016

From accounts of individuals who frequented the Pulse nightclub, it was a very close environment, usually very full, and had a single entrance and ext.�

All of these together are characteristics that security practitioners? at all venues�need to think about before an attack like Sunday's occurs, says Jeffrey Slotnick, CPP, PSP, CSO of OR3M and president of Setracon Inc.�

"We have to do our due diligence, and that starts with risk assessments, plans, policies and procedures, and knowing how to react when an event like this happens," explains Slotnick, who spoke with Security Management early this morning. "It's unconscionable to think that until an event happens, these aren't considered. There's a lot that can be done."

For starters, Slotnick recommends that all venues conduct a risk and threat vulnerability assessment to consider what their risks are.�

"Many places in the United States have a greater risk of an earthquake or a hurricane than active shooter incident, but it is something that should be taken into context with everything else," he explains.�

If venues don't have a security professional on staff, they should engage one to help them conduct these assessments and develop plans to mitigate identified threats.

"Also consider physical security devices that you might have," Slotnick says. For instance, when you go to a football game, there are "literally hundreds of screeners doing checks of individuals. If you've got a club [like Pulse], maybe you need to have a magnetometer or someone with a hand wand."

Slotnick also says venues should consider having a physical security presence that people know about. "If you look at the shooting at the Jewish community center in Los Angeles a few years ago, in the post-incident analysis, the shooter actually looked at several facilities but they had an armed security presence. So he chose that facility because it did not."

Finally, Slotnick says training your people on what to do if they notice someone or something suspicious is critical.

"We talk about see something, say something. People need to be more cognizant of their surroundings," he explains. Employees should be trained on how to report suspicious individuals, such as someone who is dressed differently than the environment, and what the plans and procedures for dealing with that report are.

"The bad guy can be wrong 100 times," Slotnick says.�"We only get to be wrong once."?

For additional resources on soft target�security and active shooters, Slotnick recommends reading theseASIS reference materials andpreparedness materialsfrom the U.S. Department of Homeland Security and FEMA.Obama: No evidence orlando gunman part of larger plot

?UPDATE 11:45 a.m. ET, 13 June 2016

There is no evidence at this point that gunman Omar Mateen was part of a larger plot to attack the Pulse nightclub in Orlando, said President Barack Obama in a statement from the Oval Office.

"It appears to be similar to what we saw in San Bernardino, but we don't yet know," Obama told reporters.

?Obama also used the opportunity to reaffirm his belief that it is too easy for individuals seeking to do harm to obtain firearms in the United States.

"The point is, if we have self-radicalized individuals, for them to obtain weapons is in some cases going to make a difference whether they're able to carry out attacks like this or not," Obama said. "We make it very easy for individuals who are troubled or disturbed or want to engage in violent acts to obtain weapons very quickly."

This is a problem, which is exacerbated when organizations like al Qaeda or ISIL who are actively trying to promote violence entice individuals, Obama explained.�

"If that happens, and a person can get a weapon, that's a problem."??ASIS releases active shooter resources

??UPDATE 10:20 a.m. ET, 13 June 2016

ASIS International releaseda message of support for Orlando and the victims of the Pulse nightclub shooting, saying the massacre "represents the latest reprehensible attack on innocent civilians" in a statement.

"It is clear that terrorists and other attackers are now routinely targeting citizens where they play, where they shop, where they meet, and where they relax," said ASIS President David C. Davis, CPP. "The cumulative result is an attack on civilized society and values and on fundamental human dignity."

To aid the city of Orlando and the security community, ASIS is making available--free of charge--many of itsmaterials on active shooters and protecting soft targets.

"ASIS members, who include experts in all aspects of security in hundreds of chapters worldwide, are united? in their commitment to protect their communities," Davis said. "ASIS members are available to provide advice and assistance to communities to prepare for and prevent these types of attacks."?????New details emerge on gunman

UPDATE 9:30 a.m. ET, 13 June 2016

In the 24 hours since gunman Omar Mateen opened fire on an Orlando, Florida, nightclub, killing 49 and injuring 53 others, more details have emerged about him.?

Mateen was a U.S. citizen born to Afghani parents, and a resident of Florida. He earned an associate degree in criminal justice technology in 2006 and was hired in 2007 by G4S, one of the largest security companies in the world.�

In astatement released this morning?, G4S confirmed that Mateen was a security guard at a residential community in south Florida and�was off-duty at the time of the incident.

"Mateen was subject to detailed company screening when he was recruited in 2007 and re-screened in 2013 with no adverse findings," G4S said. "He was also subject to checks by a U.S. law enforcement ?agency with no findings reported to G4S."

G4S said it is providing full support to U.S. law enforcement authorities as they investigate Mateen.Mateen had also been married and divorced, with allegations that he abused his former wife, Sitora Yusifiy.�?

?Yusifiy and Mateen met through an Internet dating service and were married in March 2009 before divorcing in 2011.

"He was not a stable person," Yusifiy said to The Washington Post. "He beat me. He would just come home and start beating me up because the laundry wasn't finished or something like that."

After the couple divorced, the FBI was called in to investigate Mateen in 2013 after co-workers reported that he suggested he had terrorist ties.�

"The FBI interviewed him twice, but after surveillance, records checks, and witness interviews, agents were unable to verify any terrorist links and closed their investigation," The New York Times reports.�

But in 2014, the FBI discovered a possible tie between Mateen and Moner Mohammad Abusalha--the first American suicide bomber in Syria who fought with the Nusra Front. After conducting an inquiry, however, the FBI found only "minimal" contact between Mateen and Abusalha.?

Being cleared by the FBI allowed Mateen to maintain both his Florida security-officer license and his job with G4S. He also had a Florida firearms license, which he used to legally purchase a handgun and a long gun just before Sunday morning's shooting.

UPDATE 6:30 a.m. ET, 13 June 2016

?????The shooting at an Orlando, Florida, nightclub in the early hours of Sunday morning has left50 dead and 53 injured according to CNN. The news agency reports that the shooter, Omar Mateen, is a U.S. citizen born to Afghani parents. During the shooting,�Mateen called 911 to pledge his support to ISIS. However, ISIS has yet to claim responsibility for the attacks. Mateen was killed by police after he took hostages inside the nightclub.

Officials are claiming that the attack is both a hate crime and an act of terrorism. In an address from the White House, President Obama said: "This is an�especially heartbreaking day for our friends who are lesbian, gay, bisexual, or transgender."

Security Management will provide ongoing coverage of the aftermath and investigation of the event. An article onpreparing for an active shooter event? helps businesses train effectively.

?ASIS International has�provided�resourceson active shooter events.�

�?