STS-131 Launch STS-131 Launch STS-131 Launch STS-131 Launch STS-131 Launch STS-131 Launch STS-131 Launch STS-131 Launch -- ISS Passes Over STS-131 Launch - Nine Minute Hold STS-131 Launch - ISS Passes Over STS-131 Launch STS-131 Launch STS-131 Launch STS-131 Launch STS-131 Launch STS-131 Launch STS-131 Launch STS-131 Launch STS-131 Launch STS-131 Launch STS-131 Launch STS-131 Launch STS-131 Launch STS-131 Launch STS-131 Launch STS-131 Launch STS-131 Launch Compare: VAB crawlerway, 1965 and 2009 Compare: VAB, 1965 and 2009 Crawler Crawler Crawler In the Trenches Flame Trench Big Holes Flame Trench Crawlerway Stand FSS and Beanie Cap Skirts Skirts Stack Skirt and Plume Hole Stack Repairs Engines SSME SRB Engines Carriage T-0 Umbilical Leading Edge White Room Arm White Room Middeck Slide Wire Escape Basket Nose Windows Belly Bipod Tank and Dewar Discovery Backyard Crawler and Rocket Row This End Up Structure Nose VAB Stack White Room Cone and Ogive Structure Stack Discovery Discovery Discovery Discovery Passage High Bay Passage Bunker Tunnels Safe Haven Stands Belly External Tank SRB Nose External Tank