On February 23, 1945, Lowery, then a staff sergeant, accompanied the 40-man combat patrol (which included two Navy corpsmen) that climbed Mount Suribachi to seize and occupy the crest and raise the Second Battalion's U.S. flag if possible to signal that it was captured. The patrol led by First Lieutenant Harold Schrier, captured and secured the mountaintop and raised the flag attached to a Japanese steel water pipe approximately 10:30 A.M. Immediately after the flag was raised, a short firefight took place after Japanese soldiers came out of a cave. An enemy grenade was tossed, and Lowery fell with his camera several feet down the side of the crater from the blast. Lowery was unhurt, and though his camera was damaged, the film was intact.