it was written by dr jay michael gilmore. the operator of test and evaluation.t's the dot and e. a pentagon watchdog appointed by the president. his report details so many problems. a defense military publication called the f-35 a hot mess. >> let's look at why the aeroplane is dangerous to the pilot. >> okay. >> reporter: it doesn't make for easy reading. we asked to be taken through it. an engineer that evaluated planes, spray was part of the team that designed the f-16 in the early 1970s. so he is. spray has spoken with pilots who flew the f-35. chief among the concerns and that of the dot and e. >> it says live fire test and evaluation, confirm the vulnerabilities of the fuel tank structure. what does that mean? >> they implemented tests where they took pieces of the airplane and shot at it with real ammunition, and what they found was it's bad, as you would expect. >> they catch fire burn and explode. >> exactly, because there's too much flammable stuff located in for locations. think of the engine as a blow torch surrounded by fuel. that is what it is. >>