U.N. Stiffens Sanctions on North Korea, Trying to Slow Its Nuclear March The key to enforcing the Security Council’s new penalties on coal exports remains in the hands of China, North Korea’s principal coal customer. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:With Few Options, U.S. Doesn’t Rule Out Talks With North KoreaTensions in Indonesian Capital Run High as Election NearsOver 1,000 Palestinian Prisoners in Israel Stage Hunger StrikeSri Lanka Death Toll Rises in Garbage Dump CollapsePrince Harry Says He Sought Counseling Over His Mother’s DeathAbu Sayyaf Militants Behead Hostage, Philippine Forces Say