"The Fortress" Note: This item is currently in storage. The Boeing B-17 Flying Fortress was one of the most famous aircraft of World War II. Its capacity to repel enemy attacks and still inflict heavy damage to the German war machine and production centers is imaginatively rendered by C.R. Greening in this colorful caricature. Completed by Lt. Col. C. Ross Greening while a prisoner at Stalag Luft I, Barth, Germany, in 1944-1945, this work is part of a collection of artwork that was published after the war in his book titled Not As Briefed. Donated by Maj. Gen. (Ret.) W.B. Keese. Click here to return to the Featured Accessions index. Find Out More Related Fact Sheets Boeing B-17G Flying Fortress Note: The appearance of hyperlinks does not constitute endorsement by the National Museum of the USAF, the U.S. Air Force, or the Department of Defense, of the external website, or the information, products or services contained therein.