That the talks are even happening represents a historic moment, given the decades of enmity between the two countries since the 1979 Islamic Revolution and the U.S. Embassy hostage crisis.

The United States and Iran are due to hold their second round of nuclear talks on Saturday, as what both sides are looking for in a deal begins to take shape.

Iran and the United States prepared Saturday for a second round of negotiations over Tehran's rapidly advancing nuclear program in Rome The talks in Italy over Easter weekend again will hinge on U.S.