On June 22, 2009, two transit trains in Washington, DC, collided, resulting in nine deaths and dozens of injuries. It was the worst crash in the history of the Washington Metropolitan Area Transit Authority's rail transit system. This crash has raised questions about the safety of rail transit and the governments role in ensuring that safety. Nationwide, rail transit is considered one of the safest modes of transportation.

In light of lessons learned from the September 2001, terrorist attacks and other catastrophes such as Hurricanes Katrina and Gustav, the 111th Congress is expected to consider questions and issues associated with federal homeland security assistance. Federal homeland security assistance, for the purpose of this report, is defined as U.S. Department of Homeland Security programs that provide funding, training, or technical assistance to states, localities, tribes, and other entities to prepare for, respond to, and recover from man-made and natural disasters.