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How to Fake a Kamikaze Act on a Sky

How to Fake a Kamikaze Act on a Sky-Scraper

 How to Fake a Kamikaze Act on a Sky-Scraper

Problem: Raze a sky-scraper or two, in such a manner, so that it appears to have been caused by large, passenger jet impacts. In this manner the destruction of the buildings can be insured, while at the same time, the groundwork is prepared to pin the blame on an essentially tiny group of barely skilled, minimally prepared religious radicals, rather than a group of highly trained professionals, with access to carefully secured proprietary information, and the credentials to go where they wanted, when they wanted.

Why, practically any psychotic novices with zero demolition experience can apparently achieve 100% success rates at this, assuming they can simply use a joystick to steer a plane into really, really, really big wall.
We're just so vulnerable! Doesn't it scare you silly? That's the intent.

Answer: In order to maximize casualties and minimize traces of useful remnants to analyze, it must be insured that the buildings are completely razed. The hard part is doing this without a large number of tell-tale explosive charges.

Large buildings are held aloft with high strength support columns, traditionally made of steel re-enforced, modified-concrete. Bringing this type of structure down requires blasting the columns at various locations in order to either topple the columns and/or crush them with the weight of the building from above. Unfortunately, this wouldn't look right for our purposes.

Fortunately, as it so happens, the construction techniques necessary to develop extremely high-rise buildings is uniquely suited for resolving this dilemma:

In order to achieve a minimal column foot-print (width/depth at the bases) so that the lower floors of the sky-scrapers aren't dominated by space-eating structural features, designers switched to columns made of hollow steel pipes with rectangular cross sections.

With minimal need for access and/or conspicuous presence at the scene, equipment can easily be rigged to circulate a highly acidic gas through these hollow columns. This would effectively acid-etch the inner surface of the steel away in a controllable, consistent way, until it can no longer support the weight of the un-touched structure above the impact location (which corresponds with the maximum elevation the columns are weakened to.) Assuming a few basic structural details are known, the calculations needed to determine which sections of columns to expose and how long to expose them are so simple, that well, even our skill-less, scapegoat boogeymen could figure that out.

Structural Integrity Report