"We are working with them to verify the suspension of all enrichment activities and I think we are making good progress and I hope we will continue to be able to make further progress, " the IAEA chief added.

BBC: NEWS | Middle East | UN issues Iran nuclear reminder

Now, I've said this before, I'll repeat it again -- it's not for me to tell you to be patient, any more than it was for others to counsel patience to African Americans petitioning for equal rights half a century ago. (Applause.) But I will say this: We have made progress and we will make more.

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And I believe that enough members of both parties will ultimately put politics aside and help us make progress.

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But the details of the progress of the investigation, assessments about -- preliminary assessments about who may be responsible I will not make, and I think that as a matter of upholding the integrity of the investigation, others will not as well.

WHITEHOUSE: Press Briefing