Description given with photo: "Non-Stop Los Angeles - New York Flight Inaugurated New York -- Howard Hughes, pilot, and Joseph Bartles (right), relief pilot, at the controls of the TWA Constellation which inaugurated non-stop Los Angeles - New York flights when the ship landed at LaGuardia Airport Feb. 15. Hughes, famous flier and TWA executive, was at the controls during the flight made in 8 hours, 38 minutes. Many Hollywood luminaries made the first flight. Credit (ACME). 2-15-46."
From the Sister Klaryta Antoszewska Photograph Collection (PH-00352). The presentation slide lists the steps required to conduct atmospheric and underground bomb tests.