2. These photos show, left, the red telephone at Strategic Air Command headquarters near Omaha, Nebraska, and a Minuteman nuclear missile in its silo.
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3. "By 1965 they had been replaced by the much larger Titan II, which could be launched directly from its silo. With a nine-megaton warhead, Titan II was the principal weapon in the land-based U.S. nuclear arsenal until the 1980s, when it was replaced by solid-fueled ICBMs (e.g., Minuteman missiles)."
