"Black Saturday," -the U.S. Navy dropped a series of "signaling depth charges" (practice depth charges the size of hand grenades) on a Soviet submarine (B-59) at the quarantine line, unaware that it was armed with a nuclear-tipped torpedo with orders that allowed it to be used if the submarine was "hulled" (a hole in the hull from depth charges or surface fire). On the same day, a U.S. U-2 spy plane made an accidental, unauthorized ninety-minute overflight of the Soviet Union's far eastern coast. The Soviets scrambled MIG fighters from Wrangel Island and in response the American sent aloft F-102 fighters armed with nuclear air-to-air missiles over the Bering Sea