NEW CAMPAIGN Defense Secretary Robert M. Gates speaks to a group of volunteers gathered at Walter Reed Army Medical Center in Washington, D.C., June 22, 2009. Gates was at the hospital to help kick off President Barack Obama's “United We Serve” summer campaign aimed at boosting volunteerism and community service across the country. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 493959-J-DRC72-078.jpg Photo Gallery