June 12 marks the sad one-year anniversary of the terrorism attack at Pulse Nightclub in Orlando, Florida. The mass shooting left 49 people dead and 58 wounded.
Omar Mateen, 29, went on a rampage during a hate-filled shooting at the gay club Pulse in 2016.
There was a tense three-hour standoff, which left the security guard dead.
Watch: Body cam footage from police responding to the mass shooting shows the chaos as officers shouted at the killer.
Images from inside the club show the terrifying aftereffects of the attack.
The mass shooting was the deadliest terror attack in the United States since Sept. 11, 2001.
Bullets pock marked the club.
A bullet pierced one police officer's helmet, laying bare just how dangerous the devastating attack was for first responders.
Police blew holes in the club's exterior in an effort to rescue terrified hostages trapped in bathrooms. Mateen was shot dead by police just before 6 a.m.
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