NEW YORK/WASHINGTON - The United States
see Islamic State as a common enemy but are failing to overcome deep mutual distrust and agree on how to tackle the threat together, making any role for Moscow
in the US-led campaign unlikely, say US officials.
Differences between the former Cold War foes are stark, say the officials. Moscow
suspects Washington's ulterior motive is removal of its ally, Syria
's President Bashar al-Assad
. Washington refuses to consider working together as long as Moscow
insists that US strikes need Syrian and UN approval.