Tech Demo Defense Secretary Ash Carter listens to a technology demonstration at Galvanize San Francisco, March 1, 2016. Carter is on a trip to California and Washington state to discuss technology, cybersecurity initiatives and other topics with tech leaders. DoD photo by Navy Petty Officer 1st Class Tim D. Godbee SHARE: Download: Full Size (0.85 MB) Credit: MC1(SW/AW) Tim D. Godbee VIRIN: 160301-D-SK590-308A.JPG Photo Gallery