Despite nuclear probe progress, IAEA access to key Iran site elusive

VIENNA (Reuters) - The U.N. nuclear watchdog appears no closer to finding out what happened at a military site at the centre of its investigation into suspected atom bomb research by Iran, despite signs Tehran is becoming more cooperative.

A confidential report by the International Atomic Energy Agency said Iran for the first time in years had begun engaging with a long-stymied IAEA inquiry into allegations that it may have worked on designing a nuclear weapon.