Neil deGrasse Tyson on what science tells us about UFOs and Aliens

After former President Obama lit up the internet speculating that aliens probably exist, Neil deGrasse Tyson tells NBC News’ ...

MIT nuclear science professor talks U.S. airlifting nuclear reactors

NBC News' Ellison Barber talks to MIT Professor of Nuclear Science Jacopo Buongiorno about the U.S. airlifting nuclear ...