The Washington Post is reporting that the nuclear weapon plans obtained by Libya from a Pakistani smuggling network originated from China. According to the Post, documents written in Chinese were found that contained detailed, step-by-step instructions for assembling an implosion-type nuclear bomb that could fit atop a large ballistic missile. The U.S. believes any cooperation between China and Pakistan likely ended in the 1980s. Even with foreign help, the U.S. says Libya had made minimal progress toward building nuclear weapons.