"The aluminum used for commercial aircraft is nothing like the soft aluminum people see in other applications. It is strong, hard and brittle - and not that much softer than architectural steel
Yes, aluminum can offer far superior strength to steel in ratio to weight. Yes, indeed. However, when the aluminum plane strikes the steel building, the weight of the steel is going to render the much lighter aluminum into fine metallic confetti.
Carmakers understand the heavier their cars the safer they are:
[link|http://hypertextbook.com/facts/2000/YanaZorina.shtml|http://hypertextbook.../YanaZorina.shtml]
"On impact, this stuff doesn't bend and break, it shatters like glass."
yep. And, we saw nothing like this in the videos.