The Boeing B-17 Flying Fortress was a four-engine heavy bomber developed in the 1930s and widely used by the United States Army Air Forces (USAAF) in the strategic bombing campaign of World War II against German targets. Known for its robust construction, which earned it the “Flying Fortress” moniker due to its defensive firepower, the B-17 was crucial in daylight precision bombing missions. Its ability to withstand significant damage and bring its crew home made it an iconic symbol of American air power during the war.