CIA before DIA
http://www.differencebetween.net/miscellaneous/politics/political-institutions/difference-between-cia-and-dia/
While all U.S. intelligence agencies – the Federal Bureau of Investigation (FBI), the Central Intelligence Agency (CIA), the Defense Intelligence Agency (DIA) and the National Security Agency (NSA) – share the common goal of protecting the U.S. and all American citizens from foreign and domestic threats, the differences between the organizations are substantial.
In particular, the CIA and the DIA[6]: