At about 6:30 p.m., just north of the White House, federal police in riot gear fired gas canisters and used grenades containing rubber pellets to scatter largely peaceful demonstrators. Their actions cleared the way for the president, surrounded by the nation’s top law enforcement and military leaders, to walk to the historic St. John’s Church for a three-minute photo op.

Drawing on footage captured from dozens of cameras, as well as police radio communications and other records, The Washington Post reconstructed the events of this latest remarkable hour of Trump’s presidency, including of the roles of the agencies involved and the tactics and weaponry they used.

Watch the reconstruction above to see how it unfolded.