No, really. The Dept of Homeland Security's Inspector General's Office recently published its Survey of DHS Data Mining Techniques.
They identified 12 datamining "systems and capabilities" within DHS, 9 of which are currently operational. These include "Expert Systems," "Association Processes," "Threat and Risk Assement Tools," "Collaboration and Visualization Processes," and "Advanced Analytics."
Sounds like they're not exactly sure what they mean by data mining.