content: I'm actually not too sure on that one. I would agree that the water has probably penetrated most if not all of the casings by now. But it may also be prevented from reaching the core of the warheads, leaving some of the explosives far from inert. Of course it's far too risky to investigate. If you're interested, here's a list of the ordinances it was carrying.   286 × 2,000 lb (910 kg) high explosive "Blockbuster" bombs[9]   4,439 × 1,000 lb (450 kg) bombs of various types   1,925 × 500 lb (230 kg) bombs   2,815 fragmentation bombs and bomb clusters   Various explosive booster charges   Various smoke bombs, including white phosphorus bombs   Various pyrotechnic signals