some of the biggest morons i have ever seen here have posted in this thread, actually believing that there was no wreckage. YOU CAN"T SEE TINY BITS OF TWISTED ALUMINUM AND STEEL FROM 200x200 PIXEL PHOTOS THAT COVER 500 FEET!. and in fact, you can see damage to the building along the length of the wingspan IN THE PHOTOS PROVIDED IN THE LINK. don't just read the damned idiotic caption, look at the photo yourself.
the walls of the empire state building are a lot thinner than the pentagon and the plane (a b-25 mitchell) that hit it was a lot smaller and traveling slower, so less energy was absorbed by the building. plus, the engines (2 of them) had a block, which is a solid piece of metal, and not very compressable. a jet turbine on the other hand is thousands of thin blades traveling at 10s of thousands RPMs. as soon as they are seperated from the hub they'll go flying all over the place and disintegrate. they're not particularly strong either, which is why a bird sucked into and engine can destroy the engine.
the walls of the WTC were also much thinner than the walls of the pentagon, and are designed to withstand pressure from up top but not a shearing force from a 600MPH airplane hitting it (the plane was going so fast that if the pilot had pulled up suddenly it would have snapped in two, as it was the wings might have torn themselves off at any point). the WTC was mostly office space, with small load bearing stringers on the outside and main load bearing columns in a cluster on the inside. office space is mostly open, and the walls are not load bearing, they're really only there for privacy, and they're reconfigurable. so parts of the plane could go right through, expending kinetic energy over a longer period of time than the plane that hit the pentagon, as the pentagon is a brick wall. and the plane that hit an apartment building? please, apartments are made of wood and sheetrock. if a 757 hit an apartment building there wouldn't be any of the building or the plane left. a cessna has no where near the energy that a 757 has. nor the fuel capacity to burn away a lot of the plane's debris.
and you saw the pictures of the WTC wreckage. two 110 story, 1000 foot tall building reduced to a scrap heap a not even 100 feet high.
really i have to wonder if the guy that made up this drivel is laughing at you sheep who are stupid enough to think its the truth.