Senior U.S. officials in the 1960s believed that U.S. citizens cooperated with Israeli intelligence officials in assisting the Israeli nuclear weapons program, according to declassified U.S. government documents published today for the first time by the National Security Archive.

For decades there have been allegations and suspicions that foreign agents, perhaps aided by American citizens, diverted a significant amount of missing uranium from a firm called NUMEC in the small town of Apollo, Pennsylvania, to Israel. Because of the high stakes involved, the affair has been clouded in denial and concealment.

This Electronic Briefing Book provides the most revealing of the declassified documents that are currently available, including records from former CIA station chief (Tel Aviv) John Hadden, to try to illuminate part of the mystery of the Israeli nuclear weapons program.