""The Air Force has dusted off plans more than two decades old
to place fixed nuclear missiles on rail cars or massive road vehicles to protect
them from a surprise attack. The service also wants to explore alternatives to
traditional missiles to carry nuclear warheads, which could include hypersonic
aircraft capable of crossing the Atlantic Ocean in an hour, said Phillip Coyle
of the Center for Arms Control and Non-Proliferation, a former associate
director for national security and international affairs in the Obama
administration's Office of Science and Technology Policy." (thanks Amir)