the Potomac. The wheels touched the water and the surface seemed to sink while taking on a strange glassy character. The truck roared into high gear and rode forward on the surface of the water surrounded by a saucer-shaped depression. It parked two hundred yards off shore and the soldiers, goaded by the sergeant's bark, leapt out and lined up with a showy present arms. The general returned the salute and waved to the remaining vehicles. They moved forward in a series of maneuvers that indicated a great number of rehearsal hours on some hidden pond. The tanks rumbled slowly over the water while the jeeps cut back and forth through their lines in intricate patterns. The trucks backed and turned like puffing ballerinas. The audience was rooted in a hushed silence, their eyeballs bulging. They continued to watch the amazing display as General Wingrove spoke again: "You see before you a typical example of Army ingenuity, developed in Army laboratories. These motor units are supported on the surface of the water by an intensifying of the surface tension in their immediate area. Their weight is evenly distributed over the surface, causing the shallow depressions you see around them. "This remarkable feat has been accomplished by the use of the Dornifier. A remarkable invention that is named after that brilliant scientist, Colonel Robert A. Dorn, Commander of the Brooke Point Experimental Laboratory. It was there that one of the civilian employees discovered the Dorn effect—under the Colonel's constant guidance, of course. "Utilizing this invention the Army now becomes master of the sea as well as the land. Army convoys of trucks and tanks can blanket the world. The surface of the water is our highway, our motor park, our battleground—the airfield and runway for our planes." Mechanics were pushing a Shooting Star onto the water. They stepped clear as flame gushed from the tail pipe; with the familiar whooshing rumble it sped down the Potomac and hurled itself into the air. "When this cheap and simple method of crossing oceans is adopted, it will of course mean the end of that fantastic medieval anachronism, the Navy. No need for billion-dollar aircraft carriers, battleships, drydocks and all the other cumbersome junk that keeps those boats and things afloat. Give the taxpayer back his hard-earned dollar!" Teeth grated in the Naval section as carriers and battleships