Parkland March 24, 2018 7:33 pm Hundreds of Thousands Rally Nationwide to Protest Gun Violence Demonstrations were held across the U.S. to protest gun violence after 17 people were killed in a Florida high school. US & World Videos 2:03 Does Shakira still believe in love following Gerard Piqué split? 1:36 O.J. Simpson's cause of death revealed 25:57 WATCH: ‘Changing Climate' highlights the Philly-area residents who are combatting climate change 2:36 Super dad makes Mario-themed obstacle course for son's birthday 4:17 How the Philadelphia Union became the sustainability champs of the MLS