Guns + Schools (Painting #14 of 15) George Mullen, Guns + Schools, 2018, barbwire and oil on canvas, 30 x 48 inches. Copyright © 2018 George Mullen. All rights reserved. Guns + Schools (Painting #14 of 15) George Mullen, Guns + Schools, 2018, barbwire and oil on canvas, 30 x 48 inches. Copyright © 2018 George Mullen. All rights reserved.