This week, #DecipherCIA features Dice Cipher. In CIA's museum, there is a coded message hidden in a dice cipher, which is designed to look like dominoes, on the ceiling above the exhibition exploring CIA's role in conflict in Southeast Asia. As the threat of communism expanded into Southeast Asia, the US Government was convinced that if South Vietnam fell to communism, then all the neighboring countries would fall like a row of dominoes. CIA's all-source collection and analysis ultimately helped