BBC: An Afghan-born Colorado airport bus driver has pleaded guilty to plotting to blow up New York's subway system.
Najibullah Zazi told a federal court in the city that he had been planning what he called a "martyrdom operation".
Zazi pleaded guilty to conspiracy to use weapons of mass destruction, conspiracy to commit murder and providing material support to al-Qaeda.
US Attorney General Eric Holder said the plot was one of the most serious threats to the US since 9/11.
Twenty-five-year-old Zazi changed his plea from one of not guilty. He faces a sentence of life in prison without parole.
Zazi said he had agreed to carry out the attack as a protest against American military operations in his homeland, Afghanistan.
The US intelligence community has been under pressure ever since it failed to prevent an attack on an airliner bound for Detroit on Christmas Day, says the BBC's Matthew Price in New York. >>> | Monday, February 22, 2010