Why Did Congress Decide for Digital Switch

Congress decided four years ago the U.S. should switch to digital TV so some TV airwaves could be used for other things. Digital signals take just a fraction of the space of older, analog TV signals. Lawmakers set aside some of the airwaves for police and firefighters, and auctioned off the rest to wireless companies for almost $20 billion. The switch was originally scheduled for February but was postponed to June 12 after Congress and the Obama administration worried millions of Americans weren't ready.