IAEA headquarters in Vienna, Austria. Photo: wiki commons.

Washington Post – U.N. nuclear officials conceded failure on Tuesday after an extraordinary, two-day visit to Iran yielded no progress in clearing up allegations about the country’s pursuit of nuclear weapons technology.

A spokesman for the International Atomic Energy Agency said a delegation from the U.N. nuclear watchdog was returning home after being blocked by Iran from access to key records and sites. The team arrived in Tehran on Sunday at the government’s invitation to resolve long-standing disputes over whether Iranian scientists had secretly experimented with nuclear warhead designs nearly a decade ago.

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