ULA's Vulcan rocket to fly by end of 2021.

Created by JoshuaZ on 2020-12-18; known on 2022-01-01; judged wrong by JoshuaZ on 2022-01-01.

• JoshuaZ estimated 55% on 2020-12-18
• Luke estimated 40% on 2020-12-29
• JoshuaZ   judged this prediction wrong on 2022-01-01.