The DNA testing was done by several different labs if I recall correctly; There was far too much of it for any single lab.
That is true but misses the point in addressing the question that wtcconspiracy raises.
"Who did the DNA testing?", implies that the lab(s) that di it were somehow also in-on-it, part of the conspiracy to fake evidence that flt 77 hit the Pentagon. The response to this question should then be, "What lab would have sufficed for you to believe the results?" The answer one will get from conspiracists will completely avoid presenting any alternative and they will then claim that this just made this part of the subterfuge even easier.
So now they have showed that their supposed 'evidence' is once again a lack of evidence.
There is no video evidence showing something other than Flt 77 hitting the Pentagon and therefore there are suppressed videos that show exactly that.
In other words; Lack of evidence = evidence
There is no lab that they would trust to do DNA identification and therefore they conclude that there is no evidence that anyone from Flt 77 perished in the Pentagon.
Once again then; Lack of evidence = evidence
Then there are the witnesses. In this case the TM takes a slightly different tact. There are numerous witnesses that have the plane as a large airliner and a small minority saying it was a smaller craft.
In this case then the minority reports = evidence
Some go further and attempt to create senarios in which as many of those witnesses who did see a large airliner are considered unreliable because of an affiliation with either the military, the government, a government contractor or the mainstream media. The very fact that this describes a very large number of people who would be expected to live and work in the area around the Pentagon and D.C. is ignored in order to deliberatly reduce the number of , to their mind, witnesses that can be trusted. On the other hand we are told that one taxi driver cannot be trusted because his story, when twisted with enough force, does not match some of the evidence while on the other hand we can trust two police officers even though they would be prime candidates for mistrust. Why? Because their minority witness account matches what the TM would want to hear. I gues Brooks and Lagasse just didn't get the memo.