YOLA, Nigeria—The crowd of young women fell silent as Grace Dauda limped to the stage, slowed by an old shrapnel wound suffered after she and her classmates were kidnapped by Boko Haram insurgents in 2014.
Ms. Dauda gripped the microphone and began to spell. “A…M…E…R…” she stuttered nervously in English, her third language. “I…C…A…N!”
The…
