The emergence of hunter-killer and surveillance drones as revolutionary new weapons in the wars in Iraq and Afghanistan, and in counterterrorism operations in places such as Pakistan and Yemen, has spawned a multibillion-dollar industry.
Matt Keennon, program director for AeroVironment, displays the Nano Air Vehicle, also known as the Nano Hummingbird, in New York. AeroVironment is developing the Nano Hummingbird under a research contract sponsored by the Defense Advanced Research Projects Agency (DARPA), an agency of the Defense Department. The aircraft uses biological mimicry on a small scale and is aimed at someday providing reconnaissance and surveillance capabilities in urban environments.
Several tornadoes struck parts of the nation’s midsection Sunday, concentrating damage in central Oklahoma and Wichita, Kan. One person was killed near Shawnee, Okla., and 21...
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