And on Saturday, travelers from those countries making their way into the United States felt the immediate consequences of the presidential mandate. Authorities detained dozens of legal US residents at New York's John F. Kennedy International Airport, Chicago's O'Hare International Airport, Washington Dulles International Airport and other airports.
Protesters sprung into action Saturday afternoon, occupying entire airport terminals in protest of Trump and in solidarity with immigrants and refugees attempting to enter the country.
Here are some photos of the protests held in the US against Trump’s order.