Slow progress in probe may hinder Iran nuke talks

Signs that a U.N. watchdog investigation into suspected atomic bomb research by Iran is making little progress could further complicate broader diplomacy on ending the decade-old nuclear dispute that resumes in Vienna on Tuesday. The International Atomic Energy Agency (IAEA) indicated late on Monday, after a three-hour meeting with Iran, that more work was needed by the country in order to fully implement a series of nuclear transparency steps by a Thursday deadline.
Background:
Slow progress in IAEA probe may complicate Iran nuclear talks [Reuters]
Iran nuclear negotiators to start work on final accord [BBC]
Iran can increase nuclear transparency, embattled president says [Bloomberg]