An assassination attempt during the annual White House Correspondents’ Dinner has sprung a chorus of criticism over the security at the venue – which even the alleged gunman mocked in a manifesto he sent to his family before he tried to crash through security.

The gunman, Cole Tomas Allen, was able to sneak a shotgun, a handgun, and multiple knives into the building where President Trump, most of his cabinet, and many top members of Congress were mingling with journalists.

To better understand what went wrong, the New York Post spoke to former secret service agent Timothy Miller.