Teddy Roosevelt declared it the first National Monument in 1906. It's located in WY. It's composed of igneous rock I'm not sure where you got moss from. :)
Castro became worried that the USA might launch another invasion. So he made an alliance with the USSR.The soviets bought sugar off Cuba so that Cuba didnt have to trade with Kennedy. Also Khruschev put a nuclear weapons site in Cuba, this meant that they were now within range of the US therefore giving them an advantage in the arms race.
It was meant to create balance between the slave and non-slave states, but it also equally divided the free and slave states. Thomas Jefferson believed that dividing the country this way would lead to the Civil War, and he was right.