Charles Brubaker: We... are dead. We are dead.
Lt. Col Peter Willis: Shit. I was such a terrific guy.
Robert Caulfield: You wouldn't know sincerity if it ran over you.
Judy Drinkwater: Not if you were driving it.
Robert Caulfield: Somebody took a shot at me.
Walter Loughlin: When?
Robert Caulfield: Yesterday.
Walter Loughlin: Thank God I've got an alibi.
Kay Brubaker: You haven't found what you're looking for. You're embarrassed about bothering me again. However, there are one or two questions more you'd like to ask me. It's something personal and you won't bother me any more.
Robert Caulfield: I haven't found what I'm looking for. I feel embarrassed about bothering you again. However, there are one or two more questions I'd like to ask you. It's something personal and I won't bother you any more.
Walter Loughlin: You're not crazy, I'm crazy. I'm crazy for listening and I'm crazy for saying what I'm about to say. I'll give you twenty four hours to come up with something. Not forty eight. I saw the movie too, it was twenty four.
Suggested correction: They could use meteors that had landed on Earth. This is one of the theories for the "faked" moon landing, that they either created the moon rocks from scratch, or collected meteors. As for the death of the astronauts, that's not a plot hole, it's the plot of the movie; the powers that be wanted the men to fake everything and return as heroes. When they wouldn't play along, it was decided they needed to be eliminated.
It is clear from the narrative of the film that it was planned that the astronauts would "land" safely. Using meteorites would not work - exposure to the Earth's atmosphere would mean (and has meant) that the rocks would show weathering and chemical changes that anyone would be able to detect.