U.S. President Donald Trump and Russian President Vladimir Putin are set to size each other up in person for the first time on Friday in what promises to be the most highly anticipated meeting on the sidelines of the G-20 summit.
Trump has said he wants to find ways to work with Putin, a goal made more difficult by sharp differences over Russia's actions in Syria and Ukraine, and allegations Moscow meddled in the 2016 U.S. presidential election.
That means every facial expression and physical gesture will be analyzed as much as any words the two leaders utter as the world tries to read how well Trump, a real estate magnate and former reality television star, gets along with Putin, a former spy.