Man-shaped mini-planes over New York and other tech news

Human-shaped, remote-controlled flying planes took to the skies over New York and surprised on-lookers as part of a Hollywood publicity stunt.
Viral video specialists created the contraptions to promote the upcoming superhero film Chronicle.
And the giant social network Facebook hopes to raise as much as $5bn (£3.16bn, 3.8bn euros) in its stock market flotation
Spencer Kelly presents these and other technology news stories.