At age 58, Dr. William C. DeVries, the renowned heart specialist who implanted the world's first permanent artificial heart in the 1980s, joined the staff at Walter Reed Army Medical Center as a Defense Department contractor. He also joined the Army Reserve. "I think everybody has an obligation to serve," he said. "My obligation started at a late time, but I'll stay here as long as I can." Photo by Linda D. Kozaryn. At age 58, Dr. William C. DeVries, the renowned heart specialist who implanted the world's first permanent artificial heart in the 1980s, joined the staff at Walter Reed Army Medical Center as a Defense Department contractor. He also joined the Army Reserve. "I think everybody has an obligation to serve," he said. "My obligation started at a late time, but I'll stay here as long as I can." Photo by Linda D. Kozaryn. SHARE: Download: Full Size (0.22 MB) Credit: VIRIN: 712668-N-TGB12-393.jpg Photo Gallery