Robin Hood wrote:One very simple example; if the aircraft that struck the Pentagon was a Boeing 757, where are the engines? No matter how severe the crash the engines, being such a large mass, always survive. They may not look like engines anymore but, what was there before impact was still there after impact!
These sites may be of interest to you
http://911review.com/errors/pentagon/turbofans.htmlhttp://www.aerospaceweb.org/question/co ... 0265.shtmlThe second in particular dismisses on quite rational grounds some of the alternative types of engine used in supposed alternative plane/missiles.
On the limited amount of damage to the Pentagon compared to WTC (including WTC 7) the answer lies in the very very different design and construction of the WTC buildings, including WT7, known as a "tube in a tube" with very little to none intermedoate supports between the inner and outer tubes and the Pentagon which is a low-rise reinforced concrete structure with plenty of quite closely spaced pillars,
robin hood wrote:Your final paragraph is full of errors and obvious misunderstandings of the system. Washington is a very restricted air space. Any aircraft entering the area without a specific clearance would be subject to interception within minutes, that’s what NORAD is for. NORAD sat on the hijacking scenarios going on around them, for twenty minutes before they took action. Nobody it seems was available to make the decisions............ and when they eventually got their act together, they sent the two scrambled aircraft out to sea.
They also scrambled aircraft from an airfield 180 miles to the north, in spite of having (I believe) two military ‘on stand by’ fields within 12m, although both had been ‘stood down’. However, there seems to have been a lot of bewilderment in NORAD as there were exercises going on at the same time, simulating hijacked aircraft attacking targets in New York and Washington. So I suppose it would come as no surprise that there was a great deal of confusion. Listen to the ATC/NORAD transcripts....... the common question asked was ‘Is this for real or a drill?’ and not just once but virtually every bit of information being given was questioned as to it’s authenticity.
I know Wikepedia is frownd upon as being open- source but the following is quite informative and probably just as valid a source as any other internet site, which are usually the private domain of the site owners and not subject to any form of review of the objectivity of the commentator,
Wikpeadia also has references to source material..
wikipeadia wrote:Air Defense Stand Down Theory
A common claim is that the North American Aerospace Defense Command (NORAD) issued a stand down order or deliberately scrambled fighters late to allow the hijacked airplanes to reach their targets without interference. According to this theory, NORAD had the capability of locating and intercepting planes on 9/11, and its failure to do so indicates a government conspiracy to allow the attacks to occur.[67] The Web site emperors-clothes.com argues that the U.S. military failed to do their job. StandDown.net's Mark R. Elsis says "There is only one explanation for this.... Our Air Force was ordered to Stand Down on 9/11."[70][71]
In September 2001, NORAD generals said they learned of the hijackings in time to scramble fighter jets. Later, the U.S. government released tapes claiming to show the Federal Aviation Agency (FAA) did not tell the military about the hijackings until three of the four planes had crashed, a fact that would indicate that the FAA repeatedly lied to other U.S. government agencies.[72]
Phil Molé of Skeptic magazine has explained that it is neither quick nor easy to locate and intercept a plane behaving erratically, and that the hijackers turned off or disabled the onboard radar transponders. Without these transponder signals to identify the airplanes, the hijacked airplanes would have been only blips among 4,500 other blips on NORAD’S radar screens, making them very difficult to track.[67][70]
According to Popular Mechanics, only 14 fighter jets were on alert in the contiguous 48 states on 9/11. There was no automated method for the civilian air traffic controllers to alert NORAD.[70] A passenger airline hadn't been hijacked in the US since 1979.[73] "They had to pick up the phone and literally dial us," says Maj. Douglas Martin, public affairs officer for NORAD. According to Popular Mechanics, only one civilian plane was intercepted in the decade prior to 9/11, which took 1 hour and 22 minutes.[70]
Rules in effect at that time, and on 9/11, barred supersonic flight on intercepts. Before 9/11, all other NORAD interceptions were limited to offshore Air Defense Identification Zones (ADIZ). "Until 9/11 there was no domestic ADIZ," says FAA spokesman Bill Schumann. After 9/11, the FAA and NORAD increased cooperation. They set up hotlines between command centers while NORAD increased its fighter coverage and installed radar to watch airspace over the continent.[70]
http://en.wikipedia.org/wiki/9/11_conspiracy_theories
This indicates that US airspace was not so monitored by NORAD in 2001
Thank you too for the constructive nature of the debate.