NEW YORK (Reuters) -- U.S. National Security Adviser John Bolton said on Monday that Russian plans to supply Syria with an S-300 missile system would be a "significant escalation" by Moscow and that he hopes it will reconsider.
"We think introducing the S-300s to the Syrian government would be a significant escalation by the Russians ... and something that we hope, if these press reports are accurate, they would reconsider," Bolton told reporters.