From Bloomberg.com, :
Osama bin Laden ordered a strike on London’s Heathrow airport months after the Sept. 11, 2001, attacks on the U.S., the Sunday Times reported, citing transcripts of interrogations of an al-Qaeda operations chief.
Bin Laden, leader of the terrorist network, wanted to punish U.K. Prime Minister Tony Blair, and considered him his “principal enemy,” according to Khalid Sheikh Mohammed, the former operations chief and planner of the Sept. 11 attacks, the paper said. Mohammed was captured in Pakistan more than one year ago, the Times said.
Sir John Stevens, the U.K.’s Metropolitan police commissioner, has said that a terror attack on London is “inevitable” and that the bomb attacks in Madrid on March 11 should act as a “wake-up call” to Britain and Europe.
Mohammed also said that the original plan for the Sept. 11 attacks was to hijack 10 planes and crash them into landmark buildings including the Library Tower in Los Angeles and the Sears Towers in Chicago, before Bin Laden decided synchronising such an attack would be impossible, according to the report.