A major geopolitical gathering unfolded in Central Asia this week at the SCO meeting in Bishkek. While the spotlight was on the summit, another diplomatic move was unfolding right outside it. While Xi and Putin held the stage, an American envoy was working the sidelines. The question: is Washington simply watching China and Russia's backyard or quietly moving in on it? NDTV World's Gaurie Dwivedi delves deeper with an explainer.