Maybe it's because there are so few of them, but there is something special about a Scandinavian summer night. And there is no better place to spend one than at Copenhagen's Tivoli Gardens amusement park.
Long before there was Disney, there was Tivoli, the second-oldest amusement park in the world. (The oldest, Dyrehavsbakken, or Deer Park Hill, is also in Denmark.) For nearly 170 years, people have been enjoying the magic of a summer night here.
GOP presidential candidate Mitt Romney's choice of Rep. Paul Ryan of Wisconsin as his running mate may help energize support from conservative voters who like his tough approach to overhauling the federal budget.
But there's a risk that Ryan may turn off an important voting bloc: senior citizens.
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.
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.