Washington (CNN) Israeli Prime Minister Benjamin Netanyahu made a sharp case against a deal in the works to limit Iran's nuclear ambitions during a speech to Congress Tuesday, instead pushing for a tougher approach.

Here's a look at five of the key claims he made.

CLAIM: "Iran not only defies inspectors, it plays a pretty good game of hide and cheat with them. ... Right now, Iran could be hiding facilities that we don't even know about."

BOTTOM LINE: Iran has frustrated inspectors and concealed aspects of its nuclear program over the years, but the country is believed to be in compliance with its commitments now, International Atomic Energy Agency Director General Yukiya Amano told CNN in November.

Amano, though, said he can't yet confirm that Iran's enrichment program is peaceful in nature. He said, "We can verify that they are honoring the commitment that they have made, and we give the assurance every month, but the problem is that we cannot yet give the assurance that all nuclear activities in Iran is in peaceful in purpose. We cannot yet give the clean bill of health."

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