 The Atlas's own RSO charges were also wired so that they would destroy both vehicles if activated.Most Agenas also had their own separate RSO charges, although NASA planetary probes omitted them for weight-saving reasons and due to the flight trajectory used, which meant that destruct of the Agena was no longer possible following staging.Two Atlas-Agena flights involved an intentional destruct of the Atlas (Mariner 1 and Canyon 4) while two others (Midas 6 and Midas 8) resulted in an ISDS destruction of the Agena following in-flight malfunction and self-destruct of the Atlas.