After refusing to sit down and talk with Iran regarding nuclear weapons, then criticizing Senator Barack Obama for saying we should do so, the Bush Administration finally joined the effort to talk with Iran about it's nuclear program.
The talks just ended, but were called "constructive and progressing" leaving the door open to future meetings. What the U.S. seeks is an end to the possible development of nuclear weapons, and so calls for assurances that Iran suspend enrichment of uranium.
That did not happen at the conclusion of the talks.