Master Sergeant Dee W. Nelson distinguished himself by extraordinary achievement while participating in aerial flight as an HH-53B/C Pararescue/ Recovery Technician, 40th Aerospace Rescue and Recovery Squadron, Udorn Royal Thai Air Force Base, Thailand, from 31 August 1968 to 7 June 1969. During this period, Sergeant Nelson flew extremely hazardous missions through adverse weather conditions and through the constant threat of hostile ground fire and attack. In spite of this he superbly accomplished these highly intricate and hazardous missions in support of free world forces combating aggression. Through his personal bravery and energetic application of his knowledge and skill he significantly furthered the goal of the United States in Southeast Asia. The professional competence, aerial skill, and devotion to duty displayed by Sergeant Nelson reflect great credit upon himself and the United States Air Force.