Justin Bieber wins artist of the year award
Jessica Biel and Scarlett Johansson at premiere of 'Hitchcock'
Robert De Niro at screening of 'The Reluctant Fundamentalist'
Flo Rida performs on 'Today' show
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( Susan Walsh )
Will cyber weapons leave us virtually naked?
Plus, PBS's 'Humanity from Space' predicts a world population of 9 billion by 2050.
J.J. Abrams broke his back filming 'Star Wars'
The 'Star Wars: Episode VII -- The Force Awakens' director reveals to Jon Stewart how the Millennium Falcon door that injured Harrison Ford on set also broke Abrams' back.