In Florida, students at Miami Northwestern Senior High School held a walkout on Monday to protest gun violence and to mourn the deaths of a current and former student killed in a shooting in Liberty City over the weekend. Seventeen-year-old Kimson Green and 18-year-old Rickey Dixon were both killed. Two others were wounded. Liberty City is about 40 miles south of Parkland, Florida, the site of the Valentine’s Day massacre at Marjory Stoneman Douglas High School, which killed 17 people—14 students and three faculty.