their daily calories from a combination of solids, fats, and sugars, the average american gets 13% from sugar alone. the agency states this is a major common cause of obesity and nutrient deficiency. the countdown is on. in about two hours from now, 4:59 eastern, a huge 1.7-mile-wide asteroid will make a close flight by earth. its closest pass for the next 200 years. the asteroid is the 1998-qe-2, and as it approaches, nasa scientists have made a pretty exciting discovery. the asteroid has its own moon, as well. a moon that is twice the size of an ocean liner. derrick pitts is chief astronomer at the institute. we know it's making this close pass. how close are we talking here? >> well, fortunately, it's not that close a shave, craig. it's 3.6 million miles away.