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Johnny Greene was one of the colonists of Pern.
Johnny was part of Boca River Stake. When the second fall of Thread narrowly missed Boca River, Paul Benden told his wife, Ju Adjai, to send Johnny and Greg Keating in sleds with flamethrowers to help fight Thread where it had fallen.
When Landing had to be evacuated due to the imminent eruption of Mount Garben, Joel Lilienkamp was despondent over not having any way to keep track of all the goods that needed to be transported to Fort Hold. Johnny came to his rescue by getting the generators and terminals running so the colonists could record what was transported.