SAN FRANCISCO (MarketWatch) — North Korea raised its rhetoric against the U.S. over the weekend, saying its nuclear program was not a bargaining chip that could be used to negotiate with the reclusive communist nation.

Defense Secretary Chuck Hagel Reuters

The latest comments from North Korea came on Saturday, a day after U.S. Defense Secretary Chuck Hagel said the U.S. would install 14 new missile interceptors on the West Coast by 2017 as part of an effort to shield the country against a potential attack from North Korea.