Al-Qaeda forces have been driven out of Afghanistan but regroup in the tribal border region of Pakistan called South Waziristan (see December 2001-Spring 2002). However, the Pakistani government is strict about preventing US forces from crossing the border in pursuit of bin Laden or any other al-Qaeda figures. According to author James Risen, “Green Berets who served in southeastern Afghanistan say that there have been a series of tense confrontations—and even firefights—between American and Pakistani forces along the border. Both sides have largely covered up the incidents.” [Risen, 2006, pp. 181] There is no sign later of a significant change in policy, although minor skirmishes persist. For part of 2002 and into 2003, some US special forces are allowed into the region, but only by traveling with the Pakistani army, and this arrangement does not last for long (see 2002-Early 2003).