Target: United Airlines planes at Heathrow. The would-be bombers also plotted to bring down passenger jets run by American Airlines and Air Canada'Liquid Bomb' Terror Plot That Changed Air Travel Forever: How Gang Of Fanatics Planned Britain's 9/11 -- The Daily Mail
# Plot was on a bigger scale than September 11
# All three guilty men filmed suicide 'martyrdom' videos
# Cost £35million to bring would-be bombers to justice
# Gang's arrest led to liquid clampdown on flights
It was the terror plot which changed the nature of airline travel for ever.
Three British-born Islamic fanatics planned to use liquid explosives disguised as soft drinks to blow at least seven flights out of the sky and cause carnage to rival 9/11 in the U.S.
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My Comment: Chilling .... because this plot was both simple and (most likely if implemented) successful in bringing down a number of jet liners.