The Pentagon's research agency, DARPA, played key roles in developing the Internet and GPS. Now it's investing money in high school hackerspaces, where students gather to come up with high-tech ideas — like a bicycle that generates electricity.
After the president's re-election, a slew of racist comments appeared on Twitter and Facebook. Guest host Celeste Headlee discusses some of the legal and privacy issues raised when people vent online. She speaks with Rey Junco of Harvard's Berkman Center for Internet and Society and The Root's Political Correspondent Keli Goff.
Electric automaker Tesla's new Model S has received a lot of praise from the automotive press for breaking the stigma on electric cars. The challenge for the young, Silicon Valley company is to see if it can get non-car enthusiasts to get behind the wheel.
Privacy groups and tech companies have been pushing for more protection for emails and other online personal information for years. They hope the FBI investigation into Gen. David Petraeus' email correspondence with Paula Broadwell will give their efforts new momentum.
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