and it infuriates marcus beesley. >> horrific.ting here 20 years after rwanda, the anniversary we are commemorating this week. we said never again back then. we are allowing it to happen right now. >> ambassador power seems something else. >> depravity in the human heart and gets unleashed. pretty hard to put back in the box. >> an astonishing moment captures the desperation here. an investigator with human rights watch, hears the sound of a baby's cry in the bush in the middle of nowhere. [ baby crying ] >> reporter: abandoned but alive. like her country, as it distends into hell. for "nightline," i'm terry moran, in bangue, central african republic. >> an extraordinary moment caught on camera. hope the beginning of a new, and better life for that child. we will be right back. >> announcer: abc news "nightline," brought to you by nissan. ♪ let it take the weight off your drive. ♪ nissan. innovation that excites. before chantix, i tried to quit probably about five times. it was different than the other times i tried to quit. [ mal