We are spending our dollars in the wrong thing! The TSA and other agencies are in PANIC, and they are obsessed with Technology! And that just doesn't work! We will spend billions of dollars now finding a solution for detecting liquid explosives or "X", but once we get that technology, the creative terrorist will use "Y", or "Z", or "A", "B", "C" or a combination of all of the above instead! These agencies are looking for the BOMB but not for the BOMBER!
The only combination that is effective in this line of work is when you mix up Technology with Human Factor. We need to start training "selectors" in the airport in identifying suspicious behaviour. This is what El-Al has been doing for over 30 years. Random security is worthless! You have to be able to identify the possible terrorist. And believe me, no matter how ideologically brainwashed you are or how convicted you are to your fundamentalist religion, before dying or killing someone, human beings get nervous! And we must be able to identify this. Only then will we be SAFER. Yep, not 100% safe, nor 95% safe like the Israelis, for that we also need Human Intelligence in the process involved in identifying, recruiting, training, and sending a Bomber. But with that mixture of Technology and Human Factor we will be safer...and the travelers will not pay the price everytime a new type of explosive or tactic is tested by the terrorists causing the system to PANIC. In the meantime, though... it looks like we are going to have to take our security and the security of our loved ones in our own hands. There are many things one can do in order to increase one's safety should something occur. An excellent source for this can be found in Technon's Website