Cam Jansen and the Secret Service Mystery

Cam and her classmates are attending the dedication of a new library for their school. Since the governor, who is running for president, is also attending, police officers and Secret service agents are there as well. BANG! Nearly everyone in the room drops to the ground when a loud noise--that sounds like a gunshot---goes off. The Secret service agents think it's a student prank. CLICK! Cam disagrees and is determine to get to the bottom of it. Will you be able to solve the mystery before Cam does?