"A stable, democratic, economically thriving Pakistan is considered vital to U.S. interests. U.S. concerns regarding Pakistan include regional terrorism; Pakistan- Afghanistan relations; weapons proliferation; the ongoing Kashmir problem and Pakistan-India tensions; human rights protection; and economic development. A U.S.-Pakistan relationship marked by periods of both cooperation and discord was transformed by the September 2001 terrorist attacks on the United States and the ensuing enlistment of Pakistan as a key ally in U.S.-led counterterrorism efforts. Top U.S. officials regularly praise Islamabad for its ongoing cooperation, although doubts exist about Islamabad's commitment to some core U.S. interests. Pakistan is identified as a base for terrorist groups and their supporters operating in Kashmir, India, and Afghanistan. Since late 2003, Pakistan's army has been conducting unprecedented counterterrorism operations in the country's western tribal areas."
CRS Issue Brief for Congress, IB94041