True enough.
Pre 9/11, I remember having to demonstrate functionality on my cell phone countless times, not once since.
Airport security is a joke. On my last trip (Louisville, KY, 2wks ago) I discovered that I'd left a box knife in my laptop bag. AFTER I returned home, and AFTER having gone through security at both Lousiville and O'Hare. You know, one of those plastic jobs that's about 3" long with the extendable break-off blade sections. It was in the compartment with my cell phone.
The point is, the weapons used in 9/11 could still relatively easily be smuggled aboard an aircraft. I doubt that an attack of that style could succeed now, however. Not because of airport security, but because the passengers wouldn't tolerate it.
-----
Steve