AdvertisementFrom Little Rock to Parkland: A Brief History of Youth ActivismFebruary 28, 2018Erin B. LoganfacebookEmailTherese Gachnauer, center, an 18-year-old senior from Chiles High School and Kwane Gatlin, right, a 19-year-old senior from Lincoln High School, both in Tallahassee, join fellow students protesting gun violence on the steps of the old Florida Capitol in Tallahassee, Fla. (AP)