The United States is exploring the possibility of teaming with Japan to develop a counter-hypersonic interceptor, a project that could allow the Pentagon to share the cost of developing a new guided missile and build on the 16-year collaboration that produced the newest Aegis weapon: the Standard Missile-3 Block IIA. John Plumb, assistant secretary of defense for space policy, said Washington and Tokyo are in discussions about work on a hypersonic defensive missile, likely the Missile Defense Agency’s Glide Phase...
