Iranian Revolutionary Guards drive speedboats during a ceremony to commemorate the 24th anniversary of the downing of Iran Air flight 655 by the US navy, at the port of Bandar Abbas on July 2, 2012. The plane was shot down by mistake over the Gulf by the US navy's guided missile cruiser, USS Vincennes, during confrontation with Iranian speedboats on July 3, 1988, killing 290 civilian passengers and crew members. AFP PHOTO/ATTA KENARE (Photo credit should read ATTA KENARE/AFP/GettyImages)