Shahzad, a 30-year-old naturalized U.S. citizen born in Pakistan, told a federal court in New York he considered himself a "Muslim soldier" and wanted "to plead guilty 100 times more." He was named in a series of 10 charges, including attempting use of a weapon of mass destruction."
Shahzad said he purposely picked a Saturday night -- May 1 -- to leave a car packed with explosives in Times Square because the area would be crowded. Fuses to the device were lit but it failed to detonate. Bystanders noticed smoke and alerted authorities. Shahzad was arrested two days later while boarding an international flight.
During his court appearance Monday, Shahzad warned "we will be attacking U.S." unless the United States withdraws from countries such as Afghanistan and Iraq.
Shahzad is to be sentenced Oct. 5 and could be ordered to spend the rest of his life in prison.