This is plainly false. The Clinton administration drew up a plan to go take out Al Qaeda in response to the USS Cole bombing. As it was so late in his presidency, Clinton thought it would be smarter to allow the next president to begin such an operation. Bush was given those plans and trashed them. Throughout the next months, repeated warnings were given to the administration and they were totally ignored. The only high level executive committee on terrorism was headed by Dick Cheney and didn't even have their first meeting until September 10th, which was a little too late. The CIA had an intelligence skimming computer system that was very effective and could have possibly caught the hijackers beforehand, as there were people phoning in tips about them, but that system was ENDED and replaced by a less effective one that a Republican donor was selling. There was failure, after failure, after failure.
The military has a policy of never sending reinforcements into an unclear situation, because you stand a very good chance of making the situation significantly worse. For example, if you send aircraft into a situation not realizing you have twenty people with anti-aircraft weaponry, the death toll suddenly goes from 4 to 20. In fact, in Benghazi this was 100% the right call. The first two people were killed immediately, with no chance of being saved by reinforcements. The second two people were security contractors killed in a firefight later, which is (to put it bluntly) very acceptable losses. Had the area seen a sudden influx of dozens of soldiers, it could have exacerbated the situation and caused MORE deaths. More soldiers is more targets. The fact that there were ONLY two casualties after the initial attack is a testament to how WELL things were handled.
Folly and fakery have always been with us... but it has never before been as dangerous as it is now, never in history have we been able to afford it less. - Isaac Asimov
Every damn thing you do in this life, you pay for. - Edith Piaf
The party told you to reject the evidence of your eyes and ears. It was their final, most essential command. - Orwell
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