UNION CITY, CA - MARCH 14: A James Logan High School student holds a sign during a walk out demonstration on March 14, 2018 in Union City, California. Students across the nation walked out of their classrooms at 10 a.m. across time zones for 17 minutes to show solidarity for the 17 killed in the Valentine's Day attack at Marjory Stoneman Douglas High School and to make a nationwide appeal for changes in gun laws. (Photo by Justin Sullivan/Getty Images)
