Now you're getting the idea Moggie. An aircrafts wings are hollow, you should tap on your head, it makes a similar sound.
They are made of alloy sheeting wrapped over alloy ribs and spars. There's 1 or more dirty great bladders in the middle of each which were full to the brim with jet fuel. There's very little else in a wing Moggie, a few hydraulics for the ailerons, bit of wiring for the strobes, the rest is air Moggie. It's only the engines and undercarriage which are capable of any real damage to concrete walls Moggie.
Look here Moggie you can see the outline where the wings hit and disintegrated, that's exactly what you'd expect to see Moggie, unless of course your mind is leaning toward fantasy and conspiracies. I'd say there'd be a fair amount of molten alloy in there also Moggie. Still a missile fur ball????
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