Damage from space debris extends Chinese astronauts' stay on space station

Three Chinese astronauts are stuck on the Tiangong space station after it was damaged from space debris. They were supposed to return to Earth today, but will remain up in space indefinitely. The World's Host Marco Werman learns more about the threat of junk orbiting the planet from Nilton Renno. He's a professor of Climate and Space Engineering at the University of Michigan.