The Nuclear Posture Review doesn't even explicitly exclude the possibility of an RRW-like warhead.

There is always the possibility that the RRW will be resurrected; the Nuclear Posture Review doesn't even explicitly exclude the possibility of an RRW-like warhead.

The nuclear Posture Review, a sweeping statement of purpose for the U.S. nuclear Arsenal, cast light on a rarely-discussed piece of the nuclear deterrent: tactical nukes that are stationed in Europe.