I know of an incident in the fall of 2008 when VP
Cheney was visiting a rural airfield (KSGT, apparently for duck hunting) in Arkansas. An early winter storm iced over Air Force Two and there was no de-ice capability at the airfield. With Air Force Two unable to fly, VP
Cheney traveled via motorcade to Little Rock AFB and boarded the C-17 that was supposed to pick up his motorcade at KSGT. The C-17 flew back to Andrews, with VP
Cheney and his motocade on board, with call sign Air Force 2!