Former FBI chief on the incident: Concerning because the attacker got so close, security assessment needed.

Although U.S. Secret Service officers quickly neutralized the threat posed by the suspect at the White House Correspondents' Dinner, former Deputy Director of the Federal Bureau of Investigation (FBI) Andrew McCabe said it was concerning that the attacker managed to get significantly inside the security perimeter.

"Despite the good outcome, it would probably be useful for them to ask themselves some questions about how they should think about such situations in the future," McCabe told CNN. The suspect, believed to have been a hotel guest, rushed toward a security checkpoint ahead of the dinner and fired a shot before being arrested. McCabe added that the dinner should never have continued under any circumstances, as some initially suggested. "No way. There are no circumstances under which you could advise the host of that event or the president and his team to do anything other than send everyone home. We need to 'freeze' this place. This is a crime scene. Now we need to collect evidence," he emphasized.