 24 hours after he was grazed in the ear by a bullet during an assassination attempt, former President Donald Trump arrived in Milwaukee for the Republican National Convention. CBS's Scott McFarlane in Butler, Pennsylvania, when a 20-year-old gunman opened fire. The FBI acknowledges it is still trying to figure out the motive behind this attempted assassination, and they have the shooter's phone at their FBI lab in Quantico. Secret Service, whose sniper shot and killed the gunman, is also in charge of security at the GOP convention.