Microwaves are generated by heterodyning the outputs of two or more optical lasers which have differing central frequencies to produce beat frequencies in the microwave range. The rib cam has a transversely extending slot including a floor. The multi-domain network manager receives the intra-domain alarms, and correlates them to provide inter-domain alarms as well as responses in the form of corrective actions. This is accomplished by using staged partial oxidation in a partial oxidation chamber downstream of the reformer. As the tailgate door is pivotally lowered from its upright position, the shorter spring moves in tension providing a matching small force. The card reader may detect a cashless payment card presented to the card reader and the EFA may facilitate a cashless transaction in response to presentment of the cashless payment card to the card reader.