Geoff and Mike Howe, founders of Howe and Howe Technologies, Inc., have become rock-star engineers. They're best known for developing the world's fastest dual tracked vehicle for the US Army -- the Ripsaw can go from zero to 50mph in 3.5 seconds, turn on a dime, and scale a 30-foot 45-degree hill while only costing $1.5 million to produce. For their next project, they created the world's smallest tank, the Badger, for the Las Vegas Metro SWAT team. Next, they recently shipped the SR-1 subterranean rover to a mine in Alabama so that they can transport workers and supplies down the mine's miles-long shafts in a personnel carrier that can endure cratered terrain, fireball blasts, and cave-ins. (Source: Discovery Channel)