Arizona July 22, 2024 12:53 pm 5 things to know about Mark Kelly Here are five things to know about the former astronaut and Arizona senator. US & World Videos 2:49 San Diego's mayoral candidates spar over homeless crisis 2:56 San Diego County Board of Supervisors District 3 candidates discuss homelessness 22:56 Politically Speaking: San Diego congressman calls for federal state of emergency on Tijuana sewage crisis 39:00 WATCH: Kamala Harris' full speech at the DNC 22:56 Politically Speaking: Mayor Gloria on Kamala Harris' California connection