Gravel helps keep the floor level and prevents moisture from seeping up. The floor installers are Jean Pierre (left), a mason, and Daniel Shenyi, operations manager for EarthEnable.
Courtesy of EarthEnable
Third-year medical student Allie Tetreault, left, talks with Gabrielle Nuki, 16, at Maine Medical Center in Portland, Maine. Gabrielle helps med students practice patient care.
Barbara Bush helps a nun to fit on a hearing device during a 2012 event in Gulu, Uganda. She says was interested in architecture as a college student but became a global health activist after visiting East Africa with her parents.