This one has always mystified me.
OK, I'll bite. Please note that I don't believe a word of the following.
<HB mode on>
We know that NASA has used DoD assets. eg ICBM platforms for Mercury/Gemini.
We know that DoD has used NASA assets. eg.Shuttle missions to launch military satellites.
We know that both are agencies of te ebil gubmint, and are thus largely interchangeable.
It is no leap at all to therefore reach the conclusion that DoD covertly created NASA as a convenient vehicle to perform the following tasks:
A) Present a public, ostensibly transparent body which could get funding in addition to the DoD itself.
B) Design hugely expensive missions, which would allow funds to be garnered for super sekrit DoD projects, for which the DoD was unable to secure funding and/or approval.
C) Perform the publicly announced space missions on the cheap to maximise the funds which could be diverted to covert ops.
D) Fake those missions which would be too expensive.
E) Pass the PR to the gullible public.
F) Distract the sheeple from the nefarious doings with the pretty pictures.
So NASA is simply a front set up by DoD to cover up all manner of shenanigans.
Why go to such trouble? you may ask.
Simple. Plausible deniability. If the DoD compartmentalises the whole thing, then no investigation of DoD budget spends will uncover the skulduggery. On the other hand, any investigation of NASA will find a happy mish mash of real and faked missions which appears plausible spending, especially given the sophistication of the fakery and the difficulty of proving it. For example, prove Curiousity really is on Mars right now. see? 2.6 billion in the bank simply by faking some telemetry and some images. In fact the failed Mars missions are even more fun. Billions "spent" and no need to even fake telemetry or images.
Once you sheeple reach this point of understanding, I can pretty well make up any delusional conspiracy I like.
<HB mode off>
WOW. After all that I can actually type with my nose.
Feel free to pick holes in that, I have no intention of defending that nonsense.