The storm that imperiled the boat Lehman was on also wiped out the airstrip where she was supposed to be picked up. To get back to home base, she and her school-age son traveled overland in a car for more than ten hours through countryside where there were no paved roads.

“As I’m bouncing around in this car, I’m wondering, ‘How do you bring services to people in a part of the world that has no infrastructure?’” Lehman, AB ’96, MBA ’05, MD ’05, recalled during an interview from her home office on Chicago’s near west side.