The Keystone LB-6 and LB-7 were 1920s American light bombers, built by the Keystone Aircraft company for the United States Army Air Corps, called Panther by the company, but adoption of the name was rejected by the U.S. Army.
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Shrapnel sprayed the five-man crew, which included 2nd Bombardment Group commander Major Lewis H. Brereton, flying co-pilot, and all except the nosegunner immediately parachuted.