but gilani became radicalized after making several trips to pakistan. he changed his name to david coleman headley, using his mother's maiden name to avoid detection. headley, seen here in this f.b.i. interrogation video, traveled the world on a u.s. passport, setting up the logistics for terrorist attacks. he was in pakistan working with elias kashmiri, one of the operational leaders of al qaeda. he worked for lashkar-e-taiba, a pakistani terrorist group that organized the attacks on hotels and a train station in mumbai, india. over 160 people were killed, including six americans. 300 others were injured. it was headley who mapped out the targets supplying videotapes maps, and g.p.s. coordinates to the attackers. between missions, headley remained under the radar screen, living quietly in chicago. in 2009, a tip from british intelligence led to headley being put under surveillance. the n.s.a. program stitched together communications between lashkar-e-taiba and a pay phone headley used in chicago as well as e-mails sent under a code name to al qaeda lea