Students hold a sign during a student walkout outside Perry Hall High School in Perry Hall, Md., Wednesday, March 14, 2018. Students across the country planned to participate in walkouts Wednesday to protest gun violence, one month after the deadly shooting inside a high school in Parkland, Fla. (AP Photo/Patrick Semansky)
Students hold a sign during a student walkout outside Perry Hall High School in Perry Hall, Md., Wednesday, March 14, 2018. Students across the country planned to participate in walkouts Wednesday to protest gun violence, one month after the deadly shooting inside a high school in Parkland, Fla. (AP Photo/Patrick Semansky)