Engineers built a tank identical to the Space Launch System tank that will be flown on Exploration Mission-1, the first flight of Space Launch System and the Orion spacecraft for testing. via NASA http://www.nasa.gov/image-feature/testing-the-space-launch-system
With a high of 43F and a low of 33F. Current temp 35 Current condition Mostly Cloudy. 
Sunrise at December 18, 2018 at 07:44AM sunset at December 18, 2018 at 05:02PM. Humidity 76%.