"Cities on Mars!" --SpaceX Founder Elon Musk Lays Out 'BFR' Interplanetary Transport Plans for the Red Planet (VIDEO)

SpaceX founder Elon Musk unveiled ambitious plans Friday to send cargo ships to Mars in five years and use rockets to carry people between Earth's major cities in under half-an-hour. The planned interplanetary transport system, codenamed BFR (Big Fucking Rocket),...