it not different systems munication equipment for air force one s i was told it s still a stable safe airplane. in the 1950s, helicopters reliably get but resident eisenhower wanted a plane to fly to his ranch in gettysburg so he asked generals to find him a twin engine plane so they put a bid and the air force bought five of them but the planes we got to see is the last one of the five still flying today. back in the 50s, helicopters were not reliably get so eisenhower wanted a plane to fly down to his grandson gettysburg he told his generals to find a twin engine airplane to land on the grass strip that s reliable and safe. many of the instruments inside are still original and i got an up close look.