In this July 9, 2020, file photo Chairman of the Joint Chiefs of Staff Gen. Mark Milley testifies during a House Armed Services Committee hearing on Capitol Hill in Washington. The nation's top military leaders were under self-quarantine Tuesday, Oct. 6, after a senior Coast Guard official tested positive for the coronavirus, the Pentagon said. Milley, and the vice chairman, Gen. John Hyten, were among those affected, U.S. officials said. (Michael Reynolds/Pool via AP, File)