From a NASA press release:

SCIENTISTS’ SHOWDOWN WITH SOIL MOISTURE AT THE O.K. CORRAL

Tombstone, Ariz., is a dusty place known for Wyatt Earp’s famous 1881 “Shootout at the O.K. Corral.” This year, from August 2 to 27, it will be known as the place where scientists from NASA, the U.S. Department of Agriculture (USDA), the National Oceanic and Atmospheric Administration (NOAA), and other institutions gather and study soil moisture to improve weather forecasts and the ability to interpret satellite data.