P5+1 consists of the United States , China , Russia , Britain , France and Germany . The U.S. and Iran will engage in additional bilateral talks . Diplomatic pressure increases as an interim period nears its end . Talks are not a substitute for the P5 + 1 agreement , an official says .
The U.S. and Iran will engage in additional bilateral talks . Diplomatic pressure increases as an interim period nears its end . Talks are not a substitute for the P5 + 1 agreement , an official says .