Final Black Widow trailer brings Scarlett Johansson back to where it all started

Natasha Romanoff's secretive past is a core part of her character's story arc over the course of the Marvel Cinematic Universe, but a final trailer for Black Widow promises to explore the moment she became the world's top spy. The new trailer focuses on two different parts of Natasha's past: her time in the Red Room and life with her family. The Red Room, which fans briefly caught a glimpse of in Avengers: Age of Ultron, is a top-secret Soviet training program. The program brainwashes young girl...