When the u. s. discovered that soviets were placing nuclear missiles in cuba, americans worried because?

When the US discovered that the Soviets were placing nuclear missiles in Cuba, the Americans worried because of the proximity of Cuba and America. Cuba is part of North America and if their enemy placed missiles there, then there is a big possibility that they are going to hit the US.  

Ataxation measure enacted to raise revenues for a standing british army in america

Could you provide the video? : )