Intercontinental ballistic missiles (ICBMs) have had and continue to have a variety of impacts on the United State Air Force. National security guidance, including a recent nuclear policy review, make clear the expected existence of ICBMs for the foreseeable future. At the same time, the relevance of ICBMs to the nation is not wholly clear. The numbers and types of nuclear arms continue to be negotiated away, and there is some academic discussion on the continued need for the traditional strategic force posture--the nuclear triad. The Air Force is articulating requirements for a new land-based strategic nuclear deterrent as well as conducting studies for long-range strike capabilities.