Social Media Apps The Defense Department released a new policy that, for the first time, spells out how military and civilian personnel must use social media to best advance the mission of the U.S. military and to avoid pitfalls that could damage the department’s credibility. SHARE: Download: Full Size (0.7 MB) Credit: Patrick Buffett, Air Force VIRIN: 210204-A-FL734-858M.JPG Photo Gallery