He was sent to post-conflict Liberia where he performed more surgeries in two months than he ever had in six months in a U.S. hospital. Since that first assignment, Dr. Krueger has worked in three other crisis zones. In Nigeria, he set up a trauma hospital. In Darfur, Sudan, he was chief of surgery in a hospital serving 120,000 displaced people. When the conflict in Sri Lanka reignited in 2007, Dr. Krueger left on a moment’s notice to treat the war injured. In the U.S., Dr. Krueger has returned to private practice at the Southern Hills Medical Center in Nashville, Tennessee.