The NASA Transition Authorization Act of 2017 mandated that NASA “develop a
human exploration roadmap…to expand human presence beyond low-Earth orbit to the
surface of Mars and beyond, considering potential interim destinations such as cislunar
space and the moons of Mars (U.S. Congress 2017, Section 432(b)).” In response, NASA
presented its current and notional plans for human space exploration in the National Space
Exploration Campaign Report (Campaign Report), released September 24, 2018.