V-1 is the common name of the Fieseler Fi 103. During development the Nazis tried to disguise the true mission of the weapon by spuriously identifying it as the Flakzielgerät 76 (FZG-76). V-1 is short for Vergeltungswaffe 1, Vengeance weapon 1.
The United States reverse-engineered the V-1 and had several ready by September 1944. France, Russia and the United States experimented with V-1s after the war. The US V-1 was the JB-2 Loon, or designated KGW-1 for the US Navy.
Greencastle claims that this is one of only two V-1s in the U.S., the other being at the Smithsonian, although several other V-1s are listed as on display nation wide.