New Delhi, May 1 -- A new viral video showed the moment a K9 unit tried to alert the security team about Cole Tomas Allen as he ran through security with a long gun toward the White House Correspondents' Association dinner.

Allen, 31, from Torrance, California, was charged with attempted assassination of the president, as well as two additional firearms counts, including discharging a weapon during a crime of violence. He faces up to life in prison if convicted of the assassination count alone.

In the video, the K9 can be seen barking at Allen through a doorway near metal detectors before the handler pulled the dog away as about a dozen federal officers were seen taking down magnetometers and casually standing around.

The footage from ...