File Description: At the time the US entered WW2 in December, 1941, flying across the
Oceans was a rare luxury. But the war required government and military
officials to travel across the oceans, and most of the four-engined commercial
long-range aircraft were put to this use: Pan Am's 14 flying boats and TWA's 5
Boeing 307 landplanes. Additional fuel tanks were added to the 307's to give
them the extra range required. The converted 307's were designated C-75
by the military.