Another Army Surgeon gains some.
In addition to service members, the doctors treated Iraqi prisoners and civilians, some of whom had chronic conditions that had been left untreated for years.
"That was a very rewarding part of being over there, to provide some of the medical care to the civilians," he said.
Since returning in February, Matsumoto said he has gained new perspective on the trials of non-combat life, such as waiting in lines or getting stuck in traffic.
"I'm sitting in traffic and I'm like, 'Hey this is great,' " he said.