Hawks began to be in public eye when he joined the Gates Flying Circus and was involved in a demonstration of the first in-flight refueling in 1921. Earl Daugherty in his JN4D Jenny had been touted as being able to stay in the air for 24 hours. Hawks flew his Standard J-1 World War I trainer carrying wing-walker Wesley May aloft to join up with Daugherty, circling over Long Beach, California. May, carrying a five-gallon can of gasoline, stepped over to Earl's ship and poured the gas in the Jenny's tank.