Self-Contained Atmospheric Protective Ensemble (SCAPE) suits are hanging in a row inside the Multi-Payload Processing Facility (MPPF) at NASA's Kennedy Space Center in Florida on Oct. 31, 2018. SCAPE operators will don the suits and then participate in a hypergolic systems hot flow test at the MPPF. The test will serve as operational validation of the hypergol subsystem and demonstrate that the hypergols subsystem can service the Orion spacecraft, flow fuel at the required rates, drain and de-service the system, and meet the intended timeline. SCAPE suite are used in operations involving toxic propellants and are supplied with air either through a hardline or through a self-contained environmental control unit.