JFK and LBJ.
George H.W. Bush.
Wow, what are the odds?
Nixon had attended a conference of the Pepsi-Cola Company representing his law firm for the client. After his defeat for Governor of California in 1962 ("You won't have Dick Nixon to kick around anymore!") he had returned to private practice. He flew out of Love Field a few hours before Kennedy flew in.
Bush spoke to a meeting of the American Association of Oil Drilling Contractors at the Sheraton Hotel on the evening of November 21, 1963.
Both Nixon and Bush couldn't remember where they were when they heard the news of JFK's shooting, the only two adults of their generation with such memory problems. Nixon finally recalled where he was, but he told two different stories. Bush didn't remember for 30 years, and he said he was in Tyler, Texas, though Barbara Bush's own memoir contradicts him. He was also an active member of the CIA at the time.