Iran must not be allowed to violate its international commitments and must not be allowed to develop nuclear weapons.

There are those who would argue that conversion is not proliferation-significant because it does not produce weapons-grade material, but from our perspective, conversion is another step forward to acquire enrichment capability.

The emphasis is shifting from maintaining existing weapons to replacing all of them.

We have a lot of different weapons out here.

We are not now seeking sanctions or other punitive measures on Iran. We support the ongoing efforts of the IAEA with the weight of the Security Council's authority.

The briefing highlighted many unanswered questions about [Iran's nuclear] program, and it also reported on new questions, including questions pointing directly to a military dimension, including the fabrication of nuclear weapons components and the design of missile re-entry vehicles.