AdvertisementAdvertisement"I don't think I had a true understanding of what heatstroke was," Lois Nigrin told Insider. Lois Nigrin was feeling tired and didn't want to climb the rocks, so they turned around. Lois Nigrin has no memory of that interaction, even when she looks at the photo. At one point, Lois Nigrin said, they asked her to draw a clock showing the time 3 o'clock. "Probably the best thing that I ever felt was that airplane landing and being back home," Joe Nigrin said.

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Persons: Lois Nigrin, Joe, heatstroke, She's, Lois, Yoon, Joe Nigrin, Kevin Foster, Lois Nigrin's, Lois Lois Nigrin didn't, she'd, It's, couldn't, Lois Lois Nigrin's, she's Organizations: Arizona Burn, Arizona Burn Center, NASA, Center for American Progress Locations: Arizona, Nebraska, Phoenix, New Mexico