Abdul Qadeer Khan, the scientist who helped Pakistan develop nuclear weapons and allegedly leaked atomic secrets to North Korea, Iran and Libya, was freed from years of de facto house arrest Friday by a high court ruling.
The United States, which worries that Iran has used Pakistani know-how in pursuit of nuclear arms, said the disgraced scientist’s release would be “extremely regrettable.” State Department spokesman Gordon Duguid said Khan remained a “serious proliferation risk.”