The Associated Press reports that “a two-pronged advance to capture key urban strongholds of the Islamic State group and its self-styled capital of Raqqa has underlined a quiet convergence of strategy between the U.S. and Russia to defeat the extremists, with Syria’s Kurds emerging as the common link.”  

“The dual advance toward Raqqa by the Syrian army from the southwest and the predominantly Kurdish Syria Democratic Forces from the north and west puts further pressure on the militants as they fend off simultaneous attacks on bastions such as Fallujah, and potentially Mosul, in neighboring Iraq.”  

“The Kurdish involvement is proving vital to the interests of Washington and Moscow.”