White House concerned over North Korean threats

According to this article, North Korea has been sending threats to the White House saying that Pyongyang was canceling the 60-year-old "armistice" that ended the Korean War. We are certainly concerned by North Korea's bellicose rhetoric," Jay Carney, Obama's spokesman revealed to White House reporters, "And the threats that they have been making follow a pattern designed to raise tension and intimidate others. The DPRK will achieve nothing by threats or provocation, which will only further isolate North Korea and undermine international efforts to ensure peace and stability in northeast Asia." North Korea wants a peace treaty, guaranteed security, and the removal of over 25,000 US troops in South Korea.