The second 2024 U.S. presidential debate took place Tuesday night in Philadelphia. Many of the debate rules — microphones on only for the speaker, no studio audience — remained the same, but there were two key differences this time around. Vice President Kamala Harris was onstage, and ABC anchors David Muir and Linsey Davis fact-checked claims made during the debate. Michael Kalenderian looks at what happened during the 90-minute debate, which could be the last between the two candidates before Election Day on Nov. 5.