stealth technology

The B-2 stealth bomber, assisted by midair refuelings, can fly a 44-hour mission to the other side of the world, take out targets using laser-guided smart munitions, then sneak out of enemy territory undetected. Yet it runs on Intel 286 processors -- state of the art in 1982, but these days, not so much.

Though it looks like an unmanned drone, and probably a tiny one at that, the Waterspout is no flying shrimp. The autonomous craft is designed to fly up to 80 miles, pick up two passengers, and return to its starting point on the open ocean.

The small helicopter, designed by a team from Technion University in Israel and Penn State, would be able to launch from a submarine swimming 50 feet below the surface. The craft would float to the surface, deploy its blades, take off even in rough seas, and fly autonomously to pick up its passengers. And, naturally, it would also use stealth technology, since you can imagine that this robo-chopper won't be deployed for run-of-the-mill pick-ups.—Gregory Mone