chibok kidnapping
The girls have been held hostage for more than two years.
Amina Ali was held captive for two years.
The actor and activist hopes to have an "actual direct impact" on their lives.
"I just wish I could tell them how much we miss them."
WHAT'S HAPPENING
"I write this letter with a heavy heart, knowing you have endured another year separated from your daughters."
The best reporting on a little-understood crisis.