Journalist Dana Priest traces the battle against terrorism in the United States, from Sept. 11 to the April 15, 2013 bombings at the Boston Marathon.

Frontline examines the war in Iraq and offers an inside look at a number controversies surrounding the war including September 11, al-Qaida, Guantanamo, Abu Ghraid, WMDs, and Fallujah.

Frontline examines the war in Iraq and offers an inside look at a number controversies surrounding the war including September 11, al-Qaida, Guantanamo, Abu Ghraid, WMDs, and Fallujah.