F-35B Joint Strike Fighters with Marine Fighter Attack Training Squadron 501 conduct aerial refueler training with a KC-130J Hercules with Marine Aerial Refueler Transport Squadron 252 Oct. 2in the sky near Eglin Air Force Base, Fla. It was the first time an operational Joint Strike Fighter had conducted air-to-air refueling. - F-35B Joint Strike Fighters with Marine Fighter Attack Training Squadron 501 conduct aerial refueler training with a KC-130J Hercules with Marine Aerial Refueler Transport Squadron 252 Oct. 2in the sky near Eglin Air Force Base, Fla. It was the first time an operational Joint Strike Fighter had conducted air-to-air refueling.