Barreira do inferno research missile site (0555S-03515W)Military Intelligence UnitBox 1Oswaldo BallousierMilitary Intelligence Unit (MIU) Files1809018068DefenseCosta e Silva, Arthur da, 1902-1969Ballistic missilesBrazil. Fôrça Aérea BrasileiraBrazil--Natalbrigadier generalValente, Cyro de SouzaBalloussier, OswaldoNatal Air BaseBallistic missile defensesBrazil1968-10-18MIU-Intelligence Information ReportDIRM 1.Q IR 1 809 0046 68 IR 1 809 0181 68United States. Department of DefenseAuthorizerHunt, Jerry J.AuthorizerBalloussier, OswaldoAssociated name