Underscoring its central role, Russia met with opposition Syrian National Council in Moscow today to discuss a new proposal.
A British insurer revoked coverage from a Russian ship that was delivering helicopters to Syria. Without insurance, ships cannot enter port.
The summit is intended to allow EU leaders to reacquaint themselves with President Vladimir Putin, but they are expected to lean on him to take a stronger stand on Syria.
The late-model Russian Sukhoi SuperJet-100 was meant to revive Russia's aging and accident-prone airplane fleet. It disappeared on a demonstration flight.
Russia has emerged as a strong backer of Kofi Annan's peace plan for Syria, and is now hammering Western nations for not doing enough to support it.