You probably don't even notice them, but social norms determine so much of your behavior - how you dress, talk, eat and even what you allow yourself to feel. These norms are so entrenched we never imagine they can shift. But Alix Spiegel and new co-host, Hanna Rosin, examine two grand social experiments that attempt to do just that: teach McDonald's employees in Russia to smile, and workers on an oil rig how to cry.