NASA Michoud: The Big Tools

In part 2 of our 4-part series, Ars Technica's Nathan Mattise tours the big tools of NASA's Michoud Assembly Facility, where the largest welding tools in the world are used to create the largest rocket ever assembled.
Read the article: http://arstechnica.com/science/2016/03/for-deep-space-rocket-dreams-nasa-calls-upon-the-worlds-best-and-biggest-tools/