Inside the airlock in the Neil Armstrong Operations and Checkout Building high bay on Nov. 6, 2018, European Space Agency (ESA) and Airbus engineers check the ESA European Service Module (ESM) after it is uncrated at NASA's Kennedy Space Center in Florida. The ESM will supply the main propulsion system and power to the Orion spacecraft for Exploration Mission-1 (EM-1), a mission to the Moon. The ESM also will house air and water for astronauts on future missions. EM-1 will be an uncrewed flight test that will provide a foundation for human deep space exploration to destinations beyond Earth orbit. EM-1 will be the first integrated test of NASA's Space Launch System, Orion and the ground systems at Kennedy.