DANANG, Vietnam (Reuters) - The prospects for a meeting between Russian President Vladimir Putin and U.S. President Donald Trump at this week s Asia-Pacific Economic Cooperation summit in Vietnam are unclear, Kremlin spokesman Dmitry Peskov said on Friday.  We don t fully understand yet. But we are patiently continuing to work in order to come to an understanding. Both presidents are in town. One way or another they will cross paths,  Peskov told reporters on the sidelines of the summit. 