Throughout centuries of war, dogs have been by service members' sides, whether they're helping save lives in the battlefield or helping them heal. And helping to heal is exactly what man's best friend is doing in the D.C. area. Since 1999, dogs at Walter Reed Army Medical Center -- and now at Walter Reed National Military Medical Center, Fort Belvoir and Fort Meade -- have helped hundreds of wounded warriors in countless ways, and they continue to do so. The U.S. Army program is unique. Wounded warriors receive help while they work to train dogs who will one day be...