A committee led by retired general Jimmy Doolittle suggested in spring 1953 that the administration study the possibility of giving the Soviets two years to cooperate, with the threat of possible war otherwise, and an Air Force study in August warned of "The Coming National Crisis" due to having to negotiate with a country run by "the whims of a small group of proven barbarians". Eisenhower and Secretary of State John Foster Dulles discussed that month their fears that, once the Soviets acquired fusion weapons, the resulting situation might force the United States into either war or dictatorship. While the president and other civilian and military leaders doubted the morality or legality of preventive war, preemptive war was much less problematic given that NSC 5410/1 March 1954 acknowledged that "the survival of the United States" was at risk. The Central Intelligence Agency believed that it could warn of a surprise Soviet attack days or even weeks ahead of time because of the necessary preparation time, and that up to 30 days would be needed to deliver all Soviet weapons. The BRAVO-ROMEO-DELTA targeting strategy continued, with tactical weapons to be used in Europe while SAC delivered strategic weapons to the USSR.