 ABC's Lana Moise has more regarding the assassination attempt. This morning, a new FBI and Homeland Security bulletin sent to law enforcement nationwide reveals on the day of the Trump rally, Thomas Matthew Crooks purchased 50 rounds of ammunition from a gun shop in Bethel Park, Pennsylvania. Also, that two improvised explosive devices were found in his car and home. Sources say on the day of the rally, Crooks, a member at a local gun club,