Totharious asks:
I have set up in play and my opponent just turned over my Aftereffects. If I destroy setup, do I get to choose all 3 personnel or do I only choose 1?
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Dilemma

2 Aftereffects
Randomly select three personnel. If the total cost of those personnel is 5 or less, they are killed. Otherwise, randomly select one of those personnel to be stopped.
"It fired a weapon that cut a swath four thousand kilometers long from Florida to Venezuela."
13 C 1
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Event

1 Set Up
Infiltration. Plays in your core. When an opponent's personnel is about to be randomly selected, if your Infiltrator is at that mission, you may destroy this event to instead choose the opponent's personnel to be selected from all eligible possibilities.

“This is ridiculous. I’m not the changeling. If I were, don’t you think I’d put up a little more of a fight?”
3 R 54
Set Up responds to "an opponent's personnel . . .", this means it allows you to choose one.