Bill Nye and Neil Tyson Tweet

Neil Tyson, astrophysicist at the American Museum of Natural History, Bill Nye, "the Science Guy" and CEO of the Planetary Society, and Tom Kalil, Deputy Director for Policy in the White House Office of Science and Technology Policy, respond to questions on Twitter during White House Office Hours in the "Twitter Situation Room" or the White House Office of Digital Strategy. The session of Office Hours on Twitter was held after the second-ever White House Science Fair to celebrate America’s young of scientists, engineers, inventors, and innovators.