Dark is falling on the US east coast, and protesters are starting to leave the demonstration area.
Washington DC police refuse to give an official count for how many people turned up today. So we're unlikely to know exactly how many people turned out in the nation's capital.
But it's clear there were more people on the streets of DC today than when Trump was sworn in as president yesterday.
Hundreds of thousands, if not millions, also staged protests against Trump in more than 600 cities and towns around the world.
Meanwhile, Trump visited the CIA headquarters where he assured America's spies he was fully behind them, before disputing media accounts of crowd figures and the weather on Friday.