The mastermind of the 9/11 attacks warned that Al-Qaeda has hidden a nuclear bomb in Europe which will unleash a "nuclear hellstorm" if Osama bin Laden is captured, leaked files revealed Monday.
The terror group also planned to make a 9/11 style attack on London's Heathrow airport by crashing a hijacked airliner into one of the terminals, the files showed.
Khalid Sheikh Mohammed told Guantanamo Bay interrogators the terror group would detonate the nuclear device if the Al-Qaeda chief was captured or killed, according to the classified files released by the WikiLeaks website.
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