The NEK facility is located at the Institute of Biomedical Problems (IBMP) at the Russian Academy of Sciences in Moscow, Russia. It is a multi-compartment, pressurized facility that is used to capture subjects' emotional and mental state in long-duration isolated and confined environment to advance understanding of behavioral risks associated with this type of spaceflight analog. Subjects are physically isolated and have limited communication to the outside world. This enables subjects to feel as if they are in an actual spaceflight environment. The two areas of study are behavioral health and biochemistry, which will monitor subjects’ psychological health and cortisol levels, respectively.