Louisville police released body camera footage of officers rushing to the scene to stop the gunman. After five were killed, the mayor called on state and federal lawmakers to pass gun safety legislation. Meanwhile in Tennessee – where a school shooting killed six people two weeks ago – the Republican governor has signed an executive order strengthening background checks. Antonia Hylton, Matt Bennett, Reed Galen, Rep. Katie Porter, John Della Volpe, Victor Shi, and Jeremy Bash join.