‘Red line’ comment last year ensured foes would view failure to act as sign of weakness

Limited mandate means UN inspectors so far powerless to go to scene in Damascus

Team to visit three sites where it is suspected the weapons were used during ongoing civil war

Deputy foreign minister keen for Iran to take part in discussions but Washington not so

Some states fear sanctions will worsen Lebanon instability

Countries agree to bury differences over Syria and to try to convene international talks with both sides

Kerry and Putin discuss ongoing rebellion againt Assad during Moscow meeting

Former war crimes prosecutor had indicated rebel forces used nerve agent