Olga Oliker: Why Paris attacks won’t transform US-Russia cooperation

US President Barack Obama (R) and Russian President Vladimir Putin (L) talk before the second working session at the G20 Summit in the Turkish Mediterranean resort of Antalya, on Nov. 16, 2015.
The outpouring of global solidarity in the face of the horrific attacks in Paris has raised hopes for improved cooperation between Russia and the United States, France and their partners in the fight against ISIS in Syria. Yet despite some encouraging words even before Nov. 13 attacks, the challenges that have hampered effective teamwork in the past remain. And they won't be easy to overcome.