While the loud chatter of students bounces off the walls of the humid gym, 67-year-old Dan Ullman’s mind is quiet.
Light filters through the windows as the sun sets on yet another day on the University of Nebraska-Lincoln’s campus, casting shadows on the several other figures scaling the three-story tall indoor rock wall.
Ullman pulls himself higher and higher off the ground. He is now 15 feet in the air. He expertly grabs hooks as a route displays itself to his knowledgeable climber’s eye…