Grand Isle was the mission codename for the Air Force missile strike against the Dome that appeared around Chester's Mill, Maine. The operation was carried out by Major Gene Ray, piloting a B-52 out of Carswell Air Force Base, circling over Burlington, Vermont. The missile struck the Dome about five feet from the ground, followed shortly by a second. Neither impact managed to damage the Dome, and most of the forest on the Tarker's Mill side of the barrier was incinerated on impact.