Geneva__ The United States and five world powers are looking to reach agreement on the first phase of a two-part nuclear deal with Iran, that would halt the expansion of Iran's nuclear program while negotiations on a comprehensive final deal take place, a senior US official said here Wednesday.
"The first step understanding would put time on the clock to negotiate a final agreement that addresses all of our concerns," the senior US administration official, speaking not for attribution, told journalists here Wednesday on the eve of two days of nuclear talks. "It's crucial we have this phase of this agreement without Iran's nuclear program marching forward."
