There is now strong evidence that these DOZENS!!!! of terrorist scum either came from or passed through Canada before committing this atrocity. This makes me physically sick to live in such a liberalized nation. I am not perfect, but there are too many people in this country who turn a blind eye to drug trafficking and the like. It would probably be the route of choice for terrorists to simply piggyback the usual petty crime that goes through Canadian transportation hubs.

My reaction is anger... non-stop anger. It makes me angry that the products of my specialty - aerospace & aircraft - can be used in such a destructive manner. Even though I am not employed in my field I have to offer solutions, whatever I can think of.... engineering solutions.

Engineering solutions:
- Aircraft need to be "foolproofed". This is not just an ordinary adjective, it has a very precise meaning in engineering. I means that things can be done one way, and one way only. For example in factories where machines and people mingle, work can be dangerous unless the machines are "foolproofed". This means that the part that is to be worked must be inserted in the correct manner before the machine can be activated. This often involves the person removing hands from a press, which has to activated by *both* hands pressing separate switches at the same time - like the activation keys to a nuclear missile silo. This ensures safe operation of the machine. This method could perhaps be used to prevent hijackings. The terrorists would need too many people to commandere an aircraft and their pathetic effort would utterly fail.

- the aircraft cockpits could have steel-framed doors with bulletproofing to prevent the door being broken down. The door could be opened using at least 15 separate keys inserted simultaneously. This is an example of foolproofing.

- cameras could be installed on aircraft to allow remote monitoring of any part of the aircraft. Multiple power supplies would prevent power from being cut. Multiple cameras and well-distributed viewing screens would prevent sabotage from going unnoticed. Panic buttons would be within reach of every passenger and every crew member.

- pilots would go through the same x-ray machines as the passengers. X-ray machines would be designed to detect not just explosived and guns, but knives as well. Knives could be detected by their geometric cusps (sharp corners & edges), and that suitcase would be searched. Strong algorithms already exist to detect edges in any computer graphic. This should be pursued.

- carry-on luggage should not be allowed on aircraft, period. Passenger boredom can be alleviated in other ways.

- alcohol should not be served on aircraft

- bomb-proof luggage containers should be used exclusively.

- terrorist-proofing should be tested endlessly to see if there is *any* way to get around them, or compromise the safety of the aircraft.

- armed guards on every aircraft.

I'm just getting started.