The Missile Defense Agency is working to determine the full extent of the delay to the Redesigned Kill Vehicle program and -- based on technology testing currently underway -- plans to revise the estimated two-year schedule slip by either lengthening the delay or trimming it as soon as this summer, according to a senior Defense Department official. Missile Defense Agency Director Lt. Gen. Samuel Greaves revealed this new circumstance regarding the new warhead being developed for the Ground-based Midcourse Defense...