 We now know as of today that the ammunition was purchased the very same day as the rally. But there's still lots of questions left to be answered about that. The FBI has also so far conducted about 100 interviews with witnesses, police officers who are at the rally. But they're still very, very unclear on the details of exactly what led to the event and how the event took place, the security of the event and how crooks got onto the roof overlooking the president.