"U.S. law requires the Secretary of State to provide Congress, by April 30 of each year, a full and complete report on terrorism with regard to those countries and groups meeting criteria set forth in the legislation. This annual report is entitled Country Reports on Terrorism. Beginning with the report for 2004, it replaced the previously published Patterns of Global Terrorism. […] Al-Qa'ida (AQ) remained the preeminent terrorist threat to the United States in 2010. Though the AQ core in Pakistan has become weaker, it retained the capability to conduct regional and transnational attacks. Cooperation between AQ and Afghanistan- and Pakistan-based militants was critical to the threat the group posed. In addition, the danger posed by Lashkar-e Tayyiba (LeT) and increased resource-sharing between AQ and its Pakistan-based allies and associates such as Tehrik-e Taliban Pakistan (TTP) and the Haqqani Network meant the aggregate threat in South Asia remained high."
U.S. Department of State: http://www.state.gov/