At the Moses Lake Sand Dunes in Grant County, Washington, the wind thrashed dust around and the rain came and went as NASA scientists field tested equipment designed for the 2020 moon landing. A lunar rover with 12 wheels, purchased locally on the advice of a local farmer, climbed the dunes. A lunar RV that can house astronauts for longer explorations also tried out the challenging terrain. Space suits were also tested, although their test subjects had to contend with the stronger Earth gravity.