Tens of thousands expected to participate in March for Our Lives

Tens of thousands expected to participate in March for Our Lives  NBCNews.com These Maryland High School Students Say The Recent Campus Shooting Makes "March For Our Lives" Personal  BuzzFeed News Rhode Island students travel to DC for March for Our Lives  WPRI 12 Eyewitness News ANALYSIS: 'March for Our Lives' could define politics for new generation  ABC NewsFull coverage