Remember the DHS is massive and took over a bunch of other agencies. Coast Guard, Customs, Secret Service, INS, TSA, Office of Counternarcotics Enforcement, and

Remember the DHS is massive and took over a bunch of other agencies. Coast Guard, Customs, Secret Service, INS, TSA, Office of Counternarcotics Enforcement, and quite a few more. Basically any justification you can imagine would fit under one of their heads, the actual reason is probably they thought the data would be useful.