U.S. Air Force Tech. Sgt. Luis Porras Vargas, Military Training Instructor, 37th Training Wing, explains a typical day as a Master MTI and the benefits of the position. This video is part three of a ten-part series highlighting the different career options within the Military Training Instructor series for the U.S. Air Force and U.S. Space Force at Joint Base San Antonio-Lackland, San Antonio, Texas. Chapter three focuses on the Master MTI referred to as a Blue Rope. (U.S. Air Force video by Brian Boisvert) More