Boeing’s CST-100 Starliner prepares for acoustic testing at Boeing’s spacecraft test facilities in El Segundo, California. This vehicle, known as Spacecraft 2, will fly Starliner’s Crew Flight Test (CFT) after it returns to Florida from environmental testing. The Starliner underwent rounds of acoustics vibration, thermal vacuum and electromagnetic interference and electromagnetic contamination testing. These tests prove Starliner’s design is capable of handling the harsh environments of launch, ascent and orbit and also prove that the electronics systems will operate in space and not interfere with other satellites or the International Space Station. CFT is Boeing’s crewed flight test of Starliner and part of NASA’s Commercial Crew Program, which will return human spaceflight launches into low-Earth orbit from U.S. soil.