Here's a photo that just came out of the SLS (Space Launch System) Core Stage being installed into the test stand at Stennis Space Center in southern Mississippi. From the NASA post: "The SLS core stage is the largest rocket stage ever built by NASA and stands 212 feet tall and measures 27.6 feet in diameter. It is equipped with state-of-the-art avionics, miles of cables, propulsion systems and propellant tanks that hold a total of 733,000 gallons of liquid oxygen and liquid hydrogen to fuel the four RS-25 engines during launch." "The Green Run testing will be the first top-to-bottom integrated testing of the stage’s systems prior to its maiden flight. Green Run testing will take place over several months and culminate with an eight-minute, full-duration hot fire of the stage’s four RS-25 engines to generate 2 million pounds of thrust, as during an actual launch."

dave boling