The Federal Bureau of Investigations has revealed what might have happened if convicted car bomber Faisal Shahzad's explosive device had actually gone off in Times Square in New York City.
The car bomb was based on the design Shahzad obtained from the Taliban in Pakistan. A model of the bomb was detonated in an empty field in Pennsylvania.
Experts said the bomb would not have taken down buildings, but it could have killed dozens of people on a busy Saturday night in Times Square.
"Following his arrest, Shahzad waived his Miranda rights and stated, among other things, that he believed his bomb would have killed at least 40 people. And that if he had not been arrested, he planned to detonate a second bomb in New York City two weeks later," the Justice Department said.
Officials with the Justice Department said Shahzad used the Internet to "measure the size of crowds in one of the most popular locations in the world in order to maximize the number of innocent victims."
Prosecutors said in a filing that they expect Shahzad to get life in prison when he is sentenced Oct. 5.