Vice President JD Vance spoke to reporters before boarding Air Force two for the return flight to the U.S. from Switzerland. "We left a lot of our team. The Iranians left a lot of their team at the resort there to keep on working at it," Vance told reporters on the tarmac. Vance did not give details on which U.S. negotiators are staying in Switzerland to continue to work out details of the interim agreement with Iran.