Privacy advocates have asked lawmakers to investigate the Department of Homeland Security office in charge of protecting Americans' privacy, saying it has shown "an extraordinary disregard" for its duty.
Patriot Act Primer The USA PATRIOT Act, approved overwhelmingly by Congress after the Sept. 11, 2001 attacks, greatly expanded the government's power to monitor, search, detain or deport suspects in terrorism-related investigations.
Homeland Security Secretary Michael Chertoff discussed lessons learned from the London bombings, security for mass transit and how to handle the likelihood of a terrorist attack at home. Listen to edited excerpts.