Why did the missiles pose such a threat to the us?

The missiles posed a significant threat to the U.S. primarily due to their potential to deliver nuclear warheads, dramatically increasing the risk of large-scale destruction. Their deployment by adversarial nations could undermine U.S. military deterrence and potentially allow for a surprise attack. Additionally, the range and accuracy of these missiles could target key U.S. infrastructure and allies, further escalating geopolitical tensions. This capability heightened fears of a nuclear confrontation during critical periods, such as the Cold War.