The movie"Fortress" takes its name from what iconic bomber in the Second European War? 
Fortress (2012 film):  "Fortress" takes its name from the iconic Boeing B-17 Flying Fortress World War II bomber that was the centerpiece of the aerial battle in Europe. European theatre of World War II: The European theatre of World War II, also known as the Second European War, was a huge area of heavy fighting across Europe, from Germany's and the Soviet Union's joint invasion of Poland in September 1939 until the end of the war with the Soviet Union conquering much of Europe along with the German unconditional surrender on May 8, 1945 (Victory in Europe Day).
Boeing B-17