US president Barack Obama speaking on the south lawn of the White House yesterday. “Russia must know that further escalation will only isolate it further from the international community,” he said. Photograph: Win McNamee/Getty Images

US president Barack Obama yesterday announced additional sanctions against 20 high-level Russian government o(...)

Visitors walk through the Korean War Veterans Memorial in Washington, DC, after the facility reopened. Photograph: Andrew Harrer/Bloomberg

Hundreds of thousands of US federal staff began returning to work today as Congress reopened the US government and signed off on more borrowing so the(...)

Protesters hold red hands up as US secretary of state John Kerry speaks before the House Foreign Affairs Committee on Capitol Hill in Washington. Photograph: Doug Mills/The New York Times

A US Senate committee approved limited US military intervention in Syria, setting the stage for a contentious debate in the full Senate next week o(...)

US president Barack Obama pauses while speaking about Syria during a joint news conference with Swedish prime minister Fredrik Reinfeldt  in Stockholm today. Photograph: Reuters

President Barack Obama said today he hoped Russian president Vladimir Putin would change his position of opposing military action against military tar(...)

A Syrian child refugee cries as he stands at a queue waiting to receive aid from Turkish humanitarian agencies at Bab al-Salam refugee camp in Syria near the Turkish border. Photograph: Ahmed Jadallah/Reuters

Israel and the US conducted joint tests of their missile operations in the Mediterranean Sea today. The tests, which were detected by Russian r(...)

By declaring last year that Dr Bashar al-Assad would cross a “red line” that could trigger a US response if he used chemical weapons, US president Barack  Obama ensured that foreign foes and allies - as well as his Republican political rivals - would view any failure to respond as a sign of presidential weakness. Photograph: Joshua Roberts/Reuters

Most Americans want no part of a US military intervention in Syria, but there is a growing sense in Washington that President Barack Obama would face (...)