"The Department of Homeland Security's (DHS) Infrastructure Protection Program (IPP) is an important component of the Administration's larger, coordinated effort to strengthen the security of America's critical infrastructure and key resources. This program implements the objectives addressed in a series of laws, strategy documents, plans and Homeland Security Presidential Directives. Of particular significance are the National Preparedness Guidelines and its associated work products, the National Infrastructure Protection Plan, and the National Strategy for Transportation Security. The Intercity Passenger Rail (Amtrak) program is a component of the DHS IPP and Transit Security Grant Program (TSGP). Other components of the DHS IPP include the FY 2008 Port Security Grant Program, Freight Rail Security Grant Program, Intercity Bus Security Grant Program, Trucking Security Program, and Buffer Zone Protection Program. The purpose of the FY 2008 Intercity Passenger Rail (Amtrak) program is to create a sustainable, risk-based effort to protect critical surface transportation infrastructure and the traveling public from acts of terrorism, major disasters, and other emergencies within the Amtrak rail system."
United States Department of Homeland Security: http://www.dhs.gov/