How do you make a working human heart? Scientists can turn stem cells into beating heart cells, but getting them to organize into a 3D heart requires a scaffold. At the Massachusetts General Hospital in Boston, Harald Ott and his team are reusing the scaffold that nature provides. They're stripping...

Capitol Policeman John Cale (Channing Tatum) has just been denied his dream job with the Secret Service of protecting President James Sawyer (Jamie Foxx). Not wanting to let down his little girl with the news, he takes her on a tour of the White House, when the complex is overtaken by a heavily arme...