Iran and six major world powers reached a nuclear deal on Tuesday, capping more than a decade of negotiations with an agreement that could transform the Middle East. U.S. President Barack Obama hailed a step toward a "more hopeful world" and Iran's President Hassan Rouhani said it proved that...

Iran and world powers have reached a historic deal under which Tehran will curb its nuclear program in exchange for the easing of economic sanctions, NBC News confirmed early Tuesday. Tehran has been negotiating with the U.S., Britain, France, Germany, Russia and China for years, with diplomats...

President Barack Obama pledged to increase U.S. support for the moderate opposition in Syria's civil war on Monday and said the United States needed to do more at home to prevent attacks and combat Islamic State efforts to recruit followers. Obama, speaking during a visit to the...

Having squarely rejected the terms of new financial aid for their cash-strapped country, Greece wakes up to an uncertain future on Monday. But on Sunday night, thousands rejoiced at the outcome of a referendum that they said slapped down the architects of a five-year austerity...