
U-S Defense Secretary Jim Mattis says the United States is concerned about Russia's presence in Afghanistan and its interactions with Taliban fighters.
Mr Mattis says this makes co-operating with Russia difficult, "I would just say that we look to engaging with Russia on a political or diolomatic level, but right now Russia is choosing to be a strategic competitor and we are finding that we can only have very modest expectations at these points in ways that we can co-operate with Russia."
