The Missile Defense Agency has pared back to $4.1 billion an originally planned $6.6 billion contract with Boeing to modernize and sustain the Ground-based Midcourse Defense program though 2023, a nearly 40 percent reduction that reflects a narrowing of the scope of the project following delays in developing a new interceptor warhead. On March 22, MDA announced that the government had partially definitized an effort first announced in January 2018 as a $6.6 billion undefinitized contract action for the Ground-based...