Graduating seniors at the Florida high school where a gunman killed 17 people in February received diplomas Sunday and heard from surprise commencement speaker Jimmy Fallon, who urged them to move forward and "don't let anything stop you."
Four families received diplomas on behalf of loved ones who were killed in the attack, which gave rise to a campaign by teens for gun control. Principal Ty Thompson underscored the honors for the dead students in a tweet.
"Remember those not with us, and celebrate all the successes the Class of 2018 has brought to the community and the world!" Thompson tweeted.