Though the threat of worldwide nuclear annihilation has lessened somewhat since the end of the Cold War, the US government's nuclear plans have gotten more sophisticated. Focus has altered from a large-scale exchange of thousands of missiles to small-scale incidents, and in response, arrangements have shifted more towards detection, prevention, and the aftermath. And yet, the legacy of the Cold War looms large, particularly in the wake of 9/11. From the old behemoth bunkers at Raven Rock and Cheyenne Mountain to sophisticated new missile tracking satellites, the United States government is committed to covering all the bases and remaining as secure as possible in the event of a crisis. This includes both preserving the president and senior leadership and informing the citizens how to prepare for a nuclear event.