US officials concluded in the 1980s that Pakistan was lying about its nuclear program but muted criticism due to Islamabad's support against the Soviets in Afghanistan, declassified documents showed.
The memos to be released Thursday reveal some of the behind-the-scenes drama between the United States and Pakistan during Ronald Reagan's presidency, foreshadowing current-day debates in the uneasy war partnership.
The documents included an account of a secret mission in June 1982 by a US envoy who confronted Pakistani military ruler Mohammed Zia ul-Haq with a letter from Reagan and said the United States had "incontrovertible" proof that Pakistan was seeking nuclear weapons.
