As a young Nigerian girl, Pearl Nwashili saw women come crying to her grandmother, bleeding and bruised from beatings at their husbands' hands. "I wanted to clean them, sew up their clothes, I wanted to heal the kids with sores, I just wanted to see people happy again as fast as possible," she says. As an adult in Lagos, she studied microbiology and earned degrees in public health as a way to help her people. With a grant from the Ford Foundation and facilities donated by Nigeria's government, Nwashili set up walk-in health centers at eight major Nigerian "motor parks," where hundreds of truck drivers, taxis and buses wait for loads and seek entertainment, food and rest in the meantime.