U.N. nuclear chief says inspectors will visit Iran sites. Tehran says only after a final deal

The head of the U.N.'s nuclear agency signaled Wednesday that his inspectors would visit Iranian nuclear enrichment sites, a key component in the interim U.S.-Iran agreement to reach an end to the war. But an Iranian diplomat promptly rejected this, saying such a visit can only come after a final deal -- a denial that highlighted the precariousness of the ongoing negotiations.