Last week, Mollie Davis helped organize the walkout against guns at Great Mills High School.
This week, she tweeted from her locked classroom with a gunman outside.
With deputies still responding, Mollie Davis tweeted from inside her locked classroom.
"Please pray for us," she wrote, and got tens of thousands of likes and retweets.
"Now were all part of this group of kids who have lived through something," she said.
Less than a week earlier, the 17-year-old was among those who helped organize a walkout to protest school shootings. And now it was happening in her school.
"We don't want our kids and their generation to have to live like that," she said in an interview via Skype.
Davis' activism has earned her criticism. On Twitter, Forever Deplorable called her an opportunist. But Davis just jokes back.
"People are slipping through the cracks, and this includes kids in school with mental health problems...Being able to slip through the cracks and get guns," she said.
Davis will be in New York this weekend, and will try to make the march there. But she says a lot of her friends are going to the march in D.C., and promising to vote against politicians who fail to keep them safe.
