 Christopher, a 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? On top of that, witnesses say that they saw the suspect on the roof with a gun and told authorities still...