Transcript for 200 Girls Kidnapped 2 Years Ago by Boko Haram Are Still Missing
Next, this evening, to an ABC news exclusive. Our team traveling to Africa, tracking the terror throat, the gee Jihadi group. The children who have escaped are now revealing a portrait of the horror. Some children turned into suicide bombers, have no idea they were carrying bombs. "Nightline" anchor juju Chang takes us overseas to meet the children. Reporter: We're traveling to the danger zone with the U.S. Ambassador to the U.N., Samantha power. It's been two years since boko harm kidnapped nearly 300 schoolgirls. 219 of them still missing. The terror group now using kidnapped children as weapons in their war, turning them into suicide bombers. 1 in 5 sue sigh attacks in the last year there was carried out by a child. They tell us many of those children are drugged. Many of them don't even know what they are carrying, some that know they are already drugged. Reporter: These children escaped the horror, carried through the forest on a days-long trek. T-w-o, two. T-w-o, two. Reporter: This 14-year-old girl told ambassador power, she still fears for her life. For the children here, going to sc school, an act of defiance. We're told those child suicide bombers are either coerced or detonated remotely or brainwashed into thinking this is a direct path to god. So, the double tragedy is that when the children are rescued, they are sometimes seen not as innocent victims, David, but as a potential security threat. Just incredible, drugged with what? Reporter: Opioids. I know you're going to follow this tonight on "Nightline." Incredible reporting. Again, a special edition of "Nightline." Much more of juju's reporting from "Nightline" later tonight. We'll see you then.
This transcript has been automatically generated and may not be 100% accurate.