Alexander was the general in charge of the Army‘s Intelligence and Security Command (INSCOM) at Fort Belvoir, Virginia. He began insisting that the NSA give him raw, unanalyzed data about suspected terrorists from the agency‘s massive digital cache, according to three former intelligence officials. Alexander had been building advanced data-mining software and analytic tools, and now he wanted to run them against the NSA‘s intelligence caches to try to find terrorists who were in the United States or planning attacks on the homeland.