darpa Dr. Justin Sanchez, director of the Defense Advanced Research Projects Agency’s Biological Technologies Office, fist-bumps with one of the first two advanced “LUKE” arms to be delivered from a new production line during a ceremony at Walter Reed National Military Medical Center in Bethesda, Md., Dec. 22, 2016 DoD photo SHARE: Download: Full Size (1.34 MB) Tags: DARPA, wounded warriors Credit: dod VIRIN: 161223-D-ZZ999-998.JPG Photo Gallery