Secretary of State Hillary Clinton says Russia's shipment of attack helicopters to Syria will escalate the conflict there. Yet Moscow says its deliveries to Syria are in line with international regulations and that it plans to continue shipments.
Diplomatic hopes have rested on Washington and Moscow agreeing on a transition plan that would end the four-decade Assad regime. Some 13,000 people have died during the uprising. Joining us now is Pieter Wezeman, an expert on international arms trading at the Stockholm International Peace Research Institute.