William Burr

Declassified documents show atomic testing in New Mexico distributed radioactive matter to an extent that the scientists at Los Alamos were ill-prepared for.

U.S.-Iran diplomacy, intelligence on South Korea's nuclear program, and fears that a reactor given to India would become a “do-it-yourself bomb kit.”

Newly declassified documents reveal how Israel operated under the noses of U.S. inspectors.

A mid-1960s “do-it-yourself” project produced “credible nuclear weapon” design from open sources.

The primary sources on Kissinger’s controversial legacy.