Secretary of State John Kerry says he is returning to Washington, D.C., to consult with President Obama following talks with his Iranian counterpart over Iran’s nuclear program. Speaking today, Kerry cited “tangible progress” on key issues, but said “very real gaps” remain ahead of a Sunday deadline. In an interview with The New York Times, Iran’s foreign minister, Mohammad Javad Zarif, said Iran could agree to freeze its nuclear capacity in exchange for sanctions relief. But Kerry refused to say if the United States would accept that deal.