To what end?
To show Ahmadinejad we are listening to him — in addition to treason, Obama is humiliating the US in front of the entire world, by having the US speak AFTER Ahmadinejad’s anti-US rant, it will appear that Iran browbeated the US into this.
Obama will announce the number of nukes we have to the world, then he’ll announce that we will completely disarm unilaterally, hoping that Iran will follow our example — either that, or he wants to help our enemies to know our strenght, exactly. NOBODY would want the enemies to know what we really have.