A Colorado high school librarian's trip to Tanzania launched a globe-spanning cultural exchange that shows no signs of flagging. "As a teacher I knew that meeting Samwel could change my students' lives," says Paula Busey, shown here wearing a Maasai necklace at back, as Samwel teaches one of her students how to jump. The Maasai are known for their ability to leap high into the air from a standing position without the use of their arms.

>> Interview With Paula Busey and Samwel Melami