One of the Senate's most vocal missile defense proponents said he was blindsided by the Pentagon's decision in August to terminate the Redesigned Kill Vehicle and raised concern the replacement program -- the new-start Next Generation Interceptor -- could take so long to develop and field it will leave the United States vulnerable to North Korean threats. Sen. Dan Sullivan (R-AK) -- who represents a state that hosts the bulk of the Ground-based Midcourse Defense Systems' interceptor fleet -- further...