The Defense Department is readying a first-ever hypersonic weapon test over the Atlantic Ocean, preparing to launch a rocket from Florida that will loft a glide vehicle thousands of miles into the open water in a high-stakes assessment that aims to validate design of a new, two-stage booster paired with the ultra-fast maneuvering payload. Nickolas Guertin, director of operational test and evaluation, revealed this development -- specifically that a prototype version of the Army’s Long Range Weapon will launch from...