Tens of thousands of Coloradans filled Denver’s Civic Center Park on Saturday as part of the national March For Our Lives rallies for gun safety. Seventeen year-old Maddie King, a survivor of the Marjory Stoneman Douglas High School shooting in Parkland, Florida, was the keynote speaker. These are just a few of the images from the event. Photos by Brett Littleton. Though not pictured here, additional events took place all over the state, including Colorado Springs, Basalt, Vail, Grand Junction and Fort Collins.