Yes you do. You claim there's a manned ISS and spacewalks and moonwalks were made.
I say PROVE it.
No, that's now how proof works. You started off by saying all space travel was a hoax. We've identified publicly available information that points to a legitimate orbiting space station. Your claim, in order to hold, must explain contrary evidence such as that. Those who bring this evidence to your attention and ask you to reconcile it with your claims are not obliged to establish its authenticity over and above your speculative dismissal.
Yes, I accept a burden of proof also but, unfortunately, I'm still seeking the required assistance from NASA.
No, it is not the fault of those whom you accuse that you are unable to substantiate your accusation.
We both have burdens of proof...
No, that is expressly
not how the burden of proof works (cf. Sagan,
Demon-Haunted World).