Defense Secretary Chuck Hagel, center, walks past Joint Chiefs Vice Chairman Navy 

Defense Secretary Chuck Hagel, center, walks past Joint Chiefs Vice Chairman Navy Adm. James Winnefeld, left, and Defense Undersecretary for Policy James Miller, at the Pentagon, Friday, March 15, 2013, after announcing the Pentagon will spend $1 billion to add 14 interceptors to a West Coast-based missile defense system, responding to what it called faster-than-anticipated North Korean progress on nuclear weapons and missiles.  (AP Photo/Cliff Owen)
Associated Press
Defense Secretary Chuck Hagel, center, walks past Joint Chiefs Vice Chairman Navy Adm. James Winnefeld, left, and Defense Undersecretary for Policy James Miller, at the Pentagon, Friday, March 15, 2013, after announcing the Pentagon will spend $1 billion to add 14 interceptors to a West Coast-based missile defense system, responding to what it called faster-than-anticipated North Korean progress on nuclear weapons and missiles. (AP Photo/Cliff Owen)
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