 A few years later, the UAV-JPO also bought several hundred Exdrones for demonstrations and training to help get tactical officers in tune with battlefield UAV capabilities.The current "Dragon Drone" is an improved version of the Exdrone, obtained through a 1996 contract with the Marines.BAI renamed the UAV since the Exdrone wasn't really all that expendable, given that it carried a reasonably sophisticated sensor system and flight avionics.