Arizona July 22, 2024 3:53 pm 5 things to know about Mark Kelly Here are five things to know about the former astronaut and Arizona senator. US & World Videos 2:15 Taskforce says Secret Service was at fault during assassination attempt on Trump in Pa. 2:56 Mail-in ballots now available in parts of Pennsylvania 5:05 Secret Service details agency failures during Trump assassination attempt at Pennsylvania rally 3:13 Slowest mail happens to be in key swing states 0:44 Kamala Harris to Oprah: ‘If somebody breaks into my house, they're getting shot'