twice as much fuel.

Doolittle's first report on the plan suggested that the bombers fly to Vladivostok after their attack, where they could be handed to the Soviet Union under the Lend-Lease program. This stratagem was intended to circumvent Moscow's April 1941 neutrality pact with Japan, but Soviet officials refused. Instead, planners looked to China, adding some 600 nautical miles (1,100 km) to the flight.