UNITED NATIONS (AP) — The same day that Russian diplomats struck a deal with Turkey over a demilitarized zone in Syria's last rebel-run region, dozens of Russian businessmen were flying home from Damascus, contracts in hand for trade with a postwar Syria.

Whatever happens to the rebels in Idlib province, Russia is determined to keep Syria solidly anchored in its sphere of influence over the long term — both as a foothold in the Middle East and as a warning to the U.S. and its allies against future interference.

"Russia wants ... a new Mideast security order," said Emile Hokayem, Middle East se...