Soviet Tu-4
In late 1944, three B-29's had to land in Vladivostok. At the time the Soviet Union was not at war with Japan. The crews were briefly interned, and then permitted to "escape." But the B-29's stayed behind.

In 1947, at a parade in Moscow, the Tu-4 flew over; it was an exact replica of the B-29. In the early years of the Cold War, the Tu-4 gave the American military planners fits, because it was the first Soviet airplane with the capability to drop nuclear bombs on the Unied States.

http://www.acepilots.com/planes/b29.html



http://www.fas.org/nuke/guide/russia/bomber/tu-4.htm

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