Kerry told reporters on Friday that Obama had "authorized and ordered this track" and that the plan would be based on specific steps, not trust. Many U.S. officials are concerned that sharing intelligence with Russia could risk revealing U.S. intelligence sources, methods and capabilities. In the end, according to two officials who support Kerry's efforts, there is no alternative to working with the Russians. Some European members of the coalition against Islamic State forces have expressed concern about sharing intelligence with Russia, which they say has been an untrustworthy partner in Syria. The Syrian opposition said it was concerned whether Russia could succeed in getting the Assad's government to ground its air force.

Source: Thanhnien News July 22, 2016 23:26 UTC