An estimated crowd of 800,000 people attended the March for our Lives in Washington, D.C., on Saturday. A section of Pennsylvania Avenue, stretching from the U.S. Capitol Building up towards The White House, is seen covered with participants here. Led by students from Marjory Stoneman Douglas High School, the march sought to raise awareness of gun violence and called for increased gun control legislation. In addition to the event in Washington, hundreds of others took place throughout the United States and around the world.