Afghan Tae Kwon Do champion Marzieh Hamidis hard road to the Paris Olympics

On the day his mother disappeared, 11-year-old Collier started looking for evidence

How Ustad Noor Bakhsh, a Pakistani shepherd in his 70s, became a folk music star

The epic quest to find an elderly Pakistani musician and his unusual stringed instrument

Erika Cheung went from a trailer park to a top tech company job, but something was off

The lives of 14 black American footballers are changed forever in a fight against racism

Maria's grandmother was forcibly taken by Australian officials, but made a daring escape

Leyner Palacios grew up around volatile armed groups so he learned to negotiate with them

The Austrian house where a doctor experimented on children

A handwritten map is all Mamadou Barry had to guide him from Guinea to Egypt