Col. (Dr.) Mark Erwin, 59th Medical Wing Operational Medicine chief, speaks to Chilean air force Maj. Pablo Gonzalez, medical health officer, on Dec. 7, at Wilford Hall’s Simulation Center on Joint Base San Antonio-Lackland, Texas. Members from the Chilean Air Force visited the 59th MDW to gain a better understanding of Critical Care Air Transportation Teams. (U.S. Air Force photo by Kiley Dougherty)