The U.S. military plans to have an initial space sensor layer operational as soon as fiscal year 2022 -- a new capability that will begin to close a blind spot in today's sensor network by giving commanders the ability to continuously track hypersonic boost glide weapons as well as long-range ballistic missiles from launch to impact. Missile Defense Agency spokeswoman Heather Cavaliere said in a statement the Defense Department aims for initial operation of the Hypersonic and Ballistic Tracking Space...