The islands natural surface and ground-water resources can only cover about 10% of the demand at present.

UNESCO: MEDIA SERVICES

Less than a mile above the crater, it sweeps the surface with ground-probing radar and begins its descent: a hundred miles per hour, fifty, twenty.

NEWYORKER: The Martian Chroniclers

Mirra deep cleans any type of in-ground pool surface and water without using the pool's filtration system, hoses or booster pumps, which results in energy cost savings from running these pool systems less frequently.

ENGADGET: iRobot flaunts the Mirra 530 pool cleaning robot, sends the Looj 330 abroad

It is expected to reveal the less salubrious parts of Roman London outside of the City walls with archaeologists anticipating to encounter Roman timber-framed buildings and a street surface 6m below ground level.

BBC: Crossrail dig unearths forgotten London

The little Mirra 530 fastidiously cleans in-ground pools, on and below the surface.

FORBES: iRobot Cleans Your World -- Floors, Gutters, and Pool. What's Next?

While this is a significant sum, to be sure, if an apples- to-apples comparison were made, the price of purchasing and operating modern fighter aircraft wings or a class of surface ships or submarines would significantly exceed that associated with a ground-based NMD system.

CENTERFORSECURITYPOLICY: Sea-Based Missile Defenses -- for the Allies, for the U.S.