Under the command of Lt. Col. H.H. “Hap” Arnold, 10 crews flying Martin B-10s leave Bolling Field, D.C., to prove the feasibility of sending an aerial force to Alaska in an emergency and to provide training for personnel flying across isolated and uninhabited areas. The crews arrive in Fairbanks on July 24. Over the next few weeks, numerous exploratory flights are made, including mapping 23,000 square miles in only three days. The crews leave Fairbanks on Aug. 16 and return to Bolling Field on Aug. 20. Arnold would later be awarded the 1934 Mackay Trophy for leading the flight.