A senior Navy official said this week the service plans to arm its Ohio-class submarines and Virginia-class attack subs with a hypersonic boost-glide weapon, in the event Defense Department leaders elect to acquire such a capability, a significant revelation about U.S. military planning for a Conventional Prompt Strike capability. Vice Adm. Terry Benedict, director of the Navy Strategic Systems Program (SSP) office, made explicit for the first time what many analysts have presumed, that the U.S. military is eyeing a...