Al Qaeda's slain leader Osama bin Laden had planned to follow up the September 11 attacks with shoe bombers to blow up American passenger planes, which would have brought the American economy to its knees, a British man convicted on terrorism charges testified in a trial in New York.
The Federal Bureau of Investigation arrested two men on Friday on charges of plotting explosions in New York City as a part of an "ongoing terror investigation" trailing the arrest of an Afghan national on similar charges last year.
An American, who received training at Al Qaeda camps in Pakistan, was on Wednesday convicted on multiple terrorism charges including plotting with two of his friends to carry out suicide attacks in the New York subways in one of the most serious terrorist plots since 9/11.
A 29-year old Pakistani man was on Tuesday sentenced to 40 years in prison by a United States court for plotting terror attacks with Al-Qaeda that targeted a crowded shopping centre in England and the New York City subway system.
Raising fears over the growing threat of home-grown extremism, three Americans, including two women, have been charged in separate cases of plotting terror strikes on United States soil using "weapons of mass destruction" and of travelling to Pakistan to fight against American forces.