The Odpor's most spectacular terrorist action was hijacking TWA Flight 355 on September 10, 1976. This terrorist action was masterminded by Zvonko Bušić, then the leader of the American branch of Odor. He and four other Croatian terrorists carried out the hijacking. Bušić also planted a bomb at Grand Central Station in New York City. An attempt to dismantle the bomb ended in a blast which killed one police officer and injured three others. All of the terrorists surrendered, and Bušić was sentenced to life in prison. The other four terrorists were sentenced to various long-term imprisonments.