Vietnamese textile mills, U.S. cotton exports, COTTON USA™ trade mission, U.S. Cotton Belt tour, building cotton trade relationships, trusted U.S. cotton supply, high-quality U.S. cotton, cotton bale sales to Vietnam, sustainable cotton farming, cotton transparency and reliability, National Cotton Council, Cotton Council International, 2024/25 cotton marketing year, Georgia and Texas cotton farms, Port of Savannah tour, USDA cotton classing office, global cotton market