About two dozen protesters sat in the middle of a roadway blocking access to one of the main gates at Kirtland Air Force Base, New Mexico, on Thursday.
The sidelining of the Abrams reflects evolving battlefield tactics where drone use has made it virtually impossible for them to maneuver without detection.
The Army notified Earl Meyer, who still carries shrapnel in his leg from when he was wounded, that it has reversed itself and granted him a Purple Heart.