(Official U.S. Navy Photograph.) black-and-white photos Northrop BT-1 Accident May 18, 2016by Lone_Sentry_Admin1 min read Sailors on the USS Yorktown rush to aid a Northrop BT-1 bomber of Bombing Squadron Five (VB-5) after a landing accident, circa 1940. (Official U.S. Navy Photograph.) (Official U.S. Navy Photograph.)