I got the text around 8 p.m. on Friday evening. “They made the summit,” my friend Eric Henderson wrote. A few hours earlier, around 5:30 p.m., Andrew “Bob” Harris became the first person with Down syndrome to climb the Grand Teton. There was also photographic proof. The next text contained a summit shot, a sun flare in the upper right corner on a cloudless day in the Tetons, with Bob and his future-brother-in-law Max Hammer, a professional skier and mountain guide, atop the jumbled apex of rock.