We have a tragic incident at an airport and suddenly there's talk about expending millions of dollars training and arming another quasi-military force (instead of ramping up and/or better deploying security). For that matter, what's with all the cameras? More cameras monitoring the landside area/checkpoint area with backroom monitors scanning for trouble - better, wider perspective, can quickly alert someone on the ground to take a closer look - would also be an option.

At any rate, consensus seems to be quickly spend plenty of taxpayer $$$.

After the Colorado theater shooting, where far more lives were lost, why wasn't there an immediate demand for armed guards in all theaters? Aren't innocent civilian lives worth just as much as government employee lives?

Oh, wait...armed guards in theaters would have to be paid for by theater owners, by jacking up ticket prices, not by taxpayers.

In one case, it's a wise and pragmatic use of taxpayers' $$$; in the other, too much to spend on something statistically unlikely.