Brazilian army Col. Sergio Reis Matos, the Brazilian partner nation liaison officer at U.S. Army South, poses for a photo in his office at the USARSOUTH headquarters at Joint Base San Antonio-Fort Sam Houston, Texas, on Jan. 7, 2025. Since July 2023, Matos has worked to strengthen the historic partnership between Brazil and the United States, focusing on enhancing military collaboration and interoperability. (U.S. Army photo by Sgt. Joshua Taeckens)