Commandant of the Marine Corps Gen. James F. Amos, left, wife Bonnie Amos, center, and Sergeant Major of the Marine Corps Micheal P. Barrett, right, discuss transplants and emerging medical science with Dr. W. P. Andrew Lee, foreground, at The Johns Hopkins Hospital here May 8. After the brief, the commandant went to visit bilateral arm transplant success Army Sgt. Brendan Marrocco, a Staten Island, N.Y., native. - Commandant of the Marine Corps Gen. James F. Amos, left, wife Bonnie Amos, center, and Sergeant Major of the Marine Corps Micheal P. Barrett, right, discuss transplants and emerging medical science with Dr. W. P. Andrew Lee, foreground, at The Johns Hopkins Hospital here May 8. After the brief, the commandant went to visit bilateral arm transplant success Army Sgt. Brendan Marrocco, a Staten Island, N.Y., native.