A nice collection film clips of the U.S.Navy experimenting with airplanes sinking Battleships. In most cases, obsolete American ones. But there is one that marked a watershed in naval/aerial warfare: the sinking of the Ostfreidland, a German battleship seized after WWI. At the time, it was an article of faith among the hard-core "Battleship Admirals" that an airplane could never sink a battleship. When the Ostfriedland rolled over and sank there were tears on the cheeks of several Admirals who were there as observers. (or, so it is said).