Grand Canyon Data (IMAGE) DOE/Sandia National Laboratories Caption Sandia National Laboratories researchers Glory and Isaac Aviña record data from two hikers who completed the Grand Canyon rim-to-rim trek. Part of the R2R WATCH study is to determine which commercial off-the-shelf devices work best in extreme environments. Credit Michael Padilla Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.