Elise Hu

The Federal Aviation Administration continues work on its multibillion-dollar upgrade to the nation's air traffic control system, but it may not be enough to stop hackers from taking control of airplanes with a smartphone.

Overnight temperatures are dipping below freezing and the forecast calls for snow, but cold, boredom and discomfort haven't stopped more than 30 Supreme Court die-hards from camping out for a seat to history.

"I just really wanted to be part of this moment, so I had been planning to come down for months," said Darienn Powers, a college student who came to Washington from New York. "No matter what, it's worth it to be in there and really experience what's going on."

Without "a few years" warning, humans currently have no capacity to stop an asteroid on a collision course with the planet, scientists told a Senate panel Wednesday.

"Right now we have no options," said former astronaut Ed Lu. "If you dont know where they are, there's nothing you can do."

Technology has made it easier than ever to track your activity levels, your sleep cycles, how you spend your time, and more. The self-trackers who near-obsessively capture and analyze their own data are part of a growing "Quantified Self" movement.