Joseph Cirincione in Foreign Policy.
New weapons systems should always meet three requirements: They should be feasible, needed, and affordable. The proposed Prompt Global Strike program, which according to U.S. Defense Secretary Robert Gates has been "embraced by the new administration," does not meet any. Using intercontinental ballistic missiles to hurl conventional warheads at caves is a truly bad idea. It would use technology that doesn't work for a capability the United States doesn't need at a cost it can't afford. Oh, and it could also start a nuclear war.