Peruvian air force students Técnica Tercera Nathaly Isabel Melgar Lopez and Técnico Inspector Antonio Moreno work on a hands-on center of gravity problem given to them by their instructor from the 571st Mobility Support Advisory Squadron at Callao Air Base in Lima, Perú. The 571st MSAS is a language enabled squadron of air advisors who assess, train, advise and assist Latin American and Caribbean partner nations in the development of their airpower capabilities as part of the U.S. Air Force’s and Air Mobility Command’s enduring building partner capacity mission. (courtesy photo)