The current radar-based air traffic control system (shown here) will eventually be replaced with a new system called NextGen, which will rely on GPS. A number of computer security experts are concerned that NextGen is insecure and vulnerable to hackers.
Credit John Moore / Getty Images
Brad "RenderMan" Haines was able to spoof the signals used in the NextGen system and create fake planes in the sky.
Hundreds gathered in Flint, Mich., Tuesday, to celebrate the return home of Olympian Claressa Shields. At 17, Shields became the first U.S. woman ever — and the only American this summer — to win a gold medal in boxing.
In a rare moment of joy, Flint greeted the high school student with a marching band and a motorcycle escort.
Care managers tend elderly people in March 2012 in Minamisoma, Japan. The home's residents were evacuated eight days after the Fukushima Dai-ichi nuclear power station was crippled by the March 11, 2011 tsunami.
It's been a record hot summer in many cities across the nation. Phoenix is no exception. This Sonoran Desert metropolis already records more days over 100 degrees than any other major U.S. city. Now, climate models predict Phoenix will soon get even hotter.
A hotter future may mean a more volatile environment — and along with it, natural disasters, greater pressure on infrastructure, and an increased physical toll on city residents.