How exactly do all these new changes and additional spending make air travel any safer than it was two months ago?

The biggest single improvement in air safety we have acheived since 9/11 is simply this: No group of passengers will ever again sit there allow anyone to take over the plane. This education we have all received makes flying safer than all the x-ray machines, and GED schooled screeners could do combined. Take all this new money and invest it in border security and immigration enforcement.
Just after we spend all this money protecting airplanes, which are probably no longer a target anyway, the terrorists will start hitting trains, buses, large events, buildings, movie theaters, malls, ...etc. What, are we going to have x-rays, metal detectors, pat downs, retna-scanners and id badges, no purses or bags at all of these events too? I just see all this attention to airport security as kind of stupid. Sure, let's get more serious about it and get better people but let's not go overboard. The bad guys have probably already moved on, but even if they haven't, as I already mentioned- no one will ever be able to repeat the 9/11 attacks.