The United States will buy heavy water from Iran's nuclear program and expects it to be delivered within weeks, U.S. officials said on Friday, a move that Republican lawmakers quickly criticized.

• April 22, 2016

Yemen's warring factions held their first direct talks in a U.N.-backed peace process on Friday and will meet again despite failing to agree on an agenda, participants said.

• April 22, 2016

Russia’s latest military moves in Syria have sharpened divisions within the U.S. administration over whether Russian President Vladimir Putin genuinely backs a U.N.-led initiative to end the civil war or is using the negotiations to mask renewed military support for Syrian President Bashar Assad.

• April 22, 2016

The United States said on Thursday it was concerned about reports that Russia is moving more military equipment into Syria to bolster President Bashar al-Assad, with a truce in tatters and peace talks in meltdown.

• April 21, 2016

Russia on Wednesday accused the Saudi-backed Syrian opposition of employing blackmail by suspending its participation in peace talks in Geneva.

• April 20, 2016

Russian and NATO envoys are unlikely to ease the worst tensions since the Cold War very much when they meet on Wednesday in their highest-level talks on security in almost two years.

• April 19, 2016

Iran showed off parts of its new Russian S-300 missile defense system during National Army Day on Sunday, where President Hassan Rouhani said the country's armed forces were no threat to neighboring countries.

• April 17, 2016

China's South China Sea fleets have conducted training drills with upgraded methods that resemble actual combat conditions to increase the fleets' combat effectiveness, according to an article published by the PLA Daily on Sunday.

• April 17, 2016