On Feb. 22, 1921, the night of a full moon, four de Havilland DH-4s took off at dawn, two from New York and two from San Francisco. One crashed in Nevada, killing the pilot. Two westbound airplanes gave up in the face of a snowstorm near Chicago. At evening, one lot of eastbound mail had been delivered by Knight to Omaha, Nebraska. Bad weather lay ahead, with snow still falling between Omaha and Chicago, and the pilot who was to fly the next leg declined to continue. Jack Knight took off instead and flew through the night, freezing cold in his open cockpit and guided by bonfires lit by postal employees and by farmers. He refueled at Iowa City, remarking later with some understatement, "Say, if you ever want to worry your head, just try to find Iowa City on a dark night with a good snow and fog hanging around." By morning he had reached Chicago, where another airplane took his cargo and continued to the East Coast, completing the transcontinental trip in 33 hours.