Headley attended a series of training camps in Pakistan in 2002 and 2003. He later decided to change his name from Daood Gilani to David Headley to allow him to conceal his Pakistani ties and portray himself as an American in India.
Headley told investigators that he made five trips to Mumbai in 2006, 2007, and 2008 to survey and videotape potential targets for a planned assault team from the Pakistani terror group Lashkar-e-Taiba.
At one point he used a GPS device to pinpoint potential landing spots for the assault team along the shores of Mumbai harbor.
The attacks were carried out from Nov. 26 to Nov. 28, 2009 by 10 men trained by Lashkar-e-Taiba. They were armed with assault rifles, grenades, and improvised explosive devices, and they killed indiscriminately.
Four months after the attacks, Headley returned to India to conduct surveillance of India’s National Defense College in Delhi and Chabad Houses in several other cities, officials said.
Headley was also asked to provide surveillance in advance of planned attacks on the Danish newspaper Morgenavisen Jyllands-Posten, which had published a controversial cartoon depicting the Prophet Mohammed in a derogatory light. The action prompted calls from Islamic militants – including members of Al Qaeda – for retaliation.