The Defense Department appears set this week to conduct a flight experiment of a long-range hypersonic glide vehicle that -- if successful -- will advance Army and Navy plans to mature prototype designs for land- and sea-launched offensive strike weapons as soon as 2023 and 2025, respectively. The Navy's Strategic Systems Program office is slated to conduct Flight Experimental Test-2 of a hypersonic glide body with launch planned from Hawaii to a target more than 2,000 nautical miles away in...