Earlier this week, President Obama’s chairman of the Federal Communications Commission may have picked his first big fight. And it wasn’t over a Janet Jackson-eque nipple-slip or a fleeting expletive: It was over your cell phone. We talk with Tim Wu, professor of law at Columbia University and co-author of the book “Who Controls the Internet?: Illusions of a Borderless World.” We also speak to freelance tech journalist Eric Krangel.