I’VE BEEN WORKING on my TechCentralStation column for this week (inspired by Jim Henley’s “a pack, not a herd” phrase) and ran across this post from September. I think that as people fight over the Homeland Security department, it’s worth remembering that so far on-the-spot responses from ordinary non-law-enforcement people — the passengers on Flight 93, the folks on hand at LAX when Mohammed Hadayet started shooting, the passengers who subdued “shoebomber” Richard Reid, and now the truck driver who spotted Muhammad and Malvo’s Caprice — have been responsible for pretty much all of our domestic victories against terrorism.