On 5 August 1945, Tibbets formally named his B-29 "Enola Gay" after his mother. "Enola Gay", serial number 4486292, had been personally selected by him, on recommendation of a civilian production supervisor, while it was still on the assembly line at the Glenn L. Martin Company plant in Bellevue, Nebraska. The regularly assigned aircraft commander, Robert A. Lewis, was unhappy to be displaced by Tibbets for this important mission, and became furious when he arrived at the aircraft on the morning of August 6 to see the aircraft he considered his painted with the now-famous nose art. Lewis would fly the mission as Tibbets's co-pilot.