Out of a possible Five on the BS Scale. Iran now has a very good idea of what the USA knows about it's program. The first question asked of Shahram Amiri was no doubt 'what questions did the CIA ask you"? The frantic damage control efforts of the CIA show just how badly the Iranian Intel guys suckered them with Shahram Amiri. This offer makes it clear that Iran now knows the USA has nothing substantial and they may continue goading Uncle Sam.
Nobel medicine prize awarded for work on parasitic diseases (Reuters)
from the article: Iran FM: Nuclear fuel talks to commence in September