It's a lesson in applause with intent.
When Donald Trump asked Congress to reject "revenge, resistance and retribution" in favour of "cooperation, compromise and the common good", Nancy Pelosi's response was a lesson in transparent non-verbal communication.
The pair has become the symbol of the divide inside American politics since Pelosi became speaker of the House of Representatives following her Democratic Party's success in mid-term elections.
The pair most notably faced off over funding for Trump's southern wall, sparking the longest government shutdown in US history that ended with a climb-down from the president.
Social media users immediately seized on the images:
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