 what we're calling an assassination attempt against our former president, Donald Trump. It's still an active crime scene. As I mentioned, we have a number of agents on scene. The FBI says Secret Service returned fire within seconds of Crooks opening fire, killing Crooks. The FBI has not yet supplied a motive for the shooting. Reaction coming in, Republicans in Congress calling on the Department of Homeland Security and the Secret Service to take part in hearings. This is ABC News.