So the TSA allows small knives on planes (and relevant to me: nail clippers) but you still can't pack more than three ounces of any liquid.
So let's get this straight:
The only thing banned now is liquids which as an actual terrorist weapon is questionable at best. (In other words, total bullshit. The 2006 "plot" involved a group of yahoos that hadn't even bought plane ticket one)
However, the weapons used in perpetrating 9/11 - totally ok.