Barack Obama is no stranger to social networks, but Google+ is still relatively new territory for him (and everyone else for that matter). The president doesn't seem afraid of mixing it up with the online riffraff, though, and will be hosting his very first Hangout tonight at 5:30pm ET. He'll be answering questions submitted via YouTube and selected by Google based on viewer rating. Sadly (or, perhaps, mercifully) this won't be a public free-for-all. Obama will be joined by five of his fellow American
