Nations race to prevent backsliding on North Korea sanctions

MANILA, Philippines (AP) — Armed with extraordinary new U.N. sanctions, nations raced Monday to ensure that North Korea's biggest trading partners actually carry them out, an elusive task that has undercut past attempts to strong-arm Pyongyang into abandoning its nuclear weapons.North Korea reacted angrily, vowing to bolster its nuclear arsenal and launch "thousands-fold" revenge against the United States. In a statement carried by state media, Kim Jong Un's government called the sanctions