The Defense Department plans to pair an Army-designed hypersonic boost glide vehicle with an off-the-shelf rocket to give the Air Force the ability to air-launch an ultrafast weapon as part of a new campaign to leverage the recent success of the Conventional Prompt Strike program, which Pentagon officials say has demonstrated technologies needed for a long-range hypersonic strike capability. Air Force Secretary Heather Wilson, speaking to the Senate Appropriations defense subcommittee May 17, disclosed these new details about the service's...