Naval air base, Corpus Christi, Texas. Highly technical training is given to an National Youth Administration (NYA) trainee (left) which will make him valuable to the Army or Navy mechanized units should he be called to service. He is helper to a Civil Service sheet metal worker (right) in the assembly and repair department at the naval air base in Corpus Christi, Texas. Trainees are qualified for civil service jobs in the assembly and repair department at the base after about a month of apprenticeship