It's not a good sign when a terror suspect can travel to Pakistan's tribal areas unimpeded. David C. Headley, an American suspect who allegedly helped plan the 2008 Mumbai bombing, moved freely between Pakistan, India, and the U.S. over almost seven years, The New York Times reports. According to documents Headley released as part of a plea agreement to spare him the death penalty, he traveled to the tribal area and al Qaeda stronghold of North Waziristan in Pakistan twice, and trained at well-known terrorist camps in Pakistan on five occasions from 2002 to 2005. More troubling is Headley's alleged involvement with a European terrorist cell that planned to attack the Copenhagen offices of the newspaper that printed cartoons about the Prophet Muhammad. Headley's story also details the close relationship between Al Qaeda and the Pakistani militant group Lashkar-e-Taiba.