For radar systems as presently understood to detect and track a B-2, an enormous energy supply would be needed to power the search radar.

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Google just announced a signature charity giving initiative, funding WWF in the development of cutting-edge technologies to help us detect and track both animals and poachers on the ground.

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The North American Aerospace Defense Command, or NORAD, which has responsibility for U.S. homeland defense, is watching the region via satellite and the USS Fitzgerald and the USS John S. McCain, Navy destroyers armed with sophisticated missile defense systems, have been positioned to best be able to detect and track a missile launch.

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In that brief span of time, providing perhaps 15 minutes of warning for a place like Honolulu, U.S. defenders would have to detect, analyze, track and intercept all incoming warheads.

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When in Live View or recording video, contrast detect AF quickly acquires, and can even track focus through the frame.

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Systems that monitor blind spots and track the alertness of drivers, and electronic stability control - which can detect and help prevent a skid - are already being introduced to many new vehicles.

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Using multi-colored lights strung across the length of the upper walkway, technicians have created a gigantic interactive exhibit wherein sensors located at either end detect travelers' Bluetooth-enabled gadgets (cellphones, laptops, PDA's, etc.) and then track their progress in pseudo-real-time as they move across the bridge.

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In fact the Rics survey has a good track record of having its finger on the pulse of the market and is often the first to detect significant changes.

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