Wendy Sherman actually said...

I understand everyone in the region's anxiety because it is our anxiety, and that is that Iran is a destabilizing influence in the region.

We are concerned about what they have done regarding missing Americans.

We are very skeptical about whether we can reach a comprehensive agreement that fully addresses all of the international community's concern...

I completely agree with you, we all do, that there are many questions here about what Iran is up to.