Advertisement2018 Brought A 'Tectonic Shift' In The Gun Control Movement, Advocates SayDecember 26, 2018Melissa BlockfacebookEmailStudent activists from Parkland, Fla., quickly mobilized after the shooting at Marjory Stoneman Douglas High School, becoming a vocal force calling for tighter gun laws. That movement led to mass "March for Our Lives" demonstrations around the country in March. (AP)