The Navy's top official said the department-wide effort to develop and field hypersonic boost glide weapons is "seamless," a claim made during a recent visit to Alabama with Army officials responsible for the nation's first successful Advanced Hypersonic Weapon test in 2011. During a Sept. 18 trip to Army Space and Missile Defense Command/Army Forces Strategic Command at Redstone Arsenal, Navy Secretary Richard Spencer was briefed by Army officials on the service's hypersonic program and efforts at SMDC to coordinate...