My interpretation is that it's mostly half-truths.

Do I think governments and militaries around the world have plans for such scenarios? Like retrieving UFOs? Yes, this seems reasonable. Do I think they have run exercises and tested those scenarios for real? Probably, yes. Most likely successfully so. Do I believe that someone with a lot of hearsay could interpret those things as "holy shit, they actually found something"? Yes, yes I do.

Is any of this proof? Nope. Extraordinary claims require extraordinary evidence.