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"EDITORS PLEASE NOTE: THIS EDIT CONTAINS GRAPHIC IMAGES               A bloody scene with people rushing to help the injured, carrying them out of an Orlando nightclub where police say 29-year-old Omar Mateen opened fire killing at least 50 people and injuring dozens more.               Mateen himself was shot dead by police.               Islamic State claimed responsibility for the attack, but investigators have not confirmed any concrete connections.               Officials say Mateen called 911 before the shooting to say he supported the extremist group.               U.S. President Barack Obama called the shooting an attack on all Americans.               (SOUNDBITE) (English) U.S. PRESIDENT BARACK OBAMA SAYING:               \"Although it's still early in the investigation, we know enough to say that this was an act of terror and an act of hate. And as Americans, we are united in grief, in outrage, and in resolve to defend out people.\"               The attack came as several cities in the U.S. celebrating gay pride festivities, including in Washington, D.C. and L.A.               Police in California arrested a heavily armed man who was headed to a Los Angeles-area pride parade that same morning, but authorities say there was no apparent link with the deadly rampage in Orlando.               Hundreds gathered for vigils across the country, including at the White House to remember the victims in the deadliest mass shooting in U.S. history."^^<http://www.w3.org/2001/XMLSchema#string>
<http://uk.reuters.com/video/2016/06/13/orlando-massacre-shakes-the-nation?videoId=368892555>