20 September 2020 Antietam Conducts Tomahawk Live-fire Missile Shoot for Exercise Valiant Shield 2020 USS Antietam (CG 54) conducted a Tomahawk land-attack cruise missile (TLAM) strike scenario, Sept. 20th, targeting the Farallon de Medinilla range, located on an uninhabited 200-acre island off the coast of Guam as part of Valliant Shield 2020...