 The FBI now in the lead of the investigation, I've been on the phone, Shannon, with multiple law enforcement sources can tell you FBI Director Christopher Wray personally briefed President Biden and his national security team about what they know so far. Authorities are certain about two things. First of all, this was an assassination attempt, full stop. The second, authorities believe this was a lone wolf attack. What is not certain, how did this suspect with a gun get on a roof and take a shot at former President of the United States, already someone under heavy protection?