You probably know, or should know, that your cellphone is tracking your location everywhere you go. But whether law enforcement officials should have access to that data is at the center of a constitutional debate.
Matt Blaze, a professor of computer and information science at the University of Pennsylvania, says location tracking is key to how the cell system operates.
It is still as dark as night as Jim Rix steps out of his red brick Chicago bungalow and gets into his car, parked on the street. It's 6 a.m., and the 53-year-old engineer is getting an early start on his 35-mile commute out to Argonne National Laboratory in Chicago's southwest suburbs.
"Depending upon weather and time of day, it can take 45 minutes to two hours to get to and from work," Rix says.
One of the effects of Superstorm Sandy a year ago could be seen at service stations throughout New York City and surrounding areas: Motorists joined long lines outside the few stations that had both electricity and gasoline.
"People were fighting over here. People were fighting over there. People were coming through the wrong way. It was chaos," Jessica Laura said at the time. "Then the cops came, and they just started organizing it."
Since then, the oil industry and policymakers have been working to shore up the region's fuel supply system.