From the unsealed criminal complaint against Faisal Shahzad:
On May 3, 2010, FAISAL SHAHZAD, the defendant, was arrested at the Airport as he attempted to leave the United States by means of a commercial flight to Dubai. After his arrest, SHAHZAD stated that he had recently received bomb-making training in Waziristan, Pakistan. In addition, SHAHZAD admitted that he had brought the Pathfinder to Times Square -- and attempted there to detonate it.
Of course, if he hadn't been Mirandized, or if the confession had been coerced, that admission wouldn't be admissible in court.
-- A. Serwer