Trump "wasn't worried" during White House Correspondents' Dinner shooting

Last night in the nation's capitol a gunman stormed the security perimeter at the White House Correspondents' Dinner. The president, the first lady, the vice president, cabinet members, and more than 2,500 guests were gathered to celebrate the First Amendment and freedom of the press. But after shots were fired, the president was evacuated. 

It was at the same hotel where President Ronald Reagan was nearly assassinated by John Hinckley, 45 years ago.

Tonight, federal investigators are looking into the motive of the alleged gunman -- a 31-year old teacher from Torrance, California. 

He emailed what a senior official called a "manifesto" to his family, minutes before the attack. He wrote he was targeting members of the Trump administration. 

We spoke with President Trump this afternoon at the White House about what happened.

Norah O'Donnell: Mr. President, do you know if you were the target of the gunman?

President Trump: I don't know. It sounded-- to me. I read a manifesto, which is-- he's radicalized. He was a Christian-- believer, and then he became an anti-Christian, and he had a lotta change. He's been goin' through a lot, based on what he wrote. His brother complained about him and I think reported him to the police. And his sister, likewise, complained about him. His family-- was very concerned. He was-- probably a pretty sick guy.