FILE - In this Oct. 7, 2008, file photo, Democratic presidential candidate Sen. Barack Obama, D-Ill., left, and Republican presidential candidate Sen. John McCain, R-Ariz., greet each other at the start of a townhall-style presidential debate at Belmont University in Nashville, Tenn. Aide says senator, war hero and GOP presidential candidate McCain died Saturday, Aug. 25, 2018. He was 81. (AP Photo/Mark Humphrey, File)
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