Why was the us government concerned about the soviet missiles in cuba?

Historians sometimes rely on video recordings in researching past events because

Yugoslavia a: nato b: warsaw pact c: not a member of either alliance

Match each idea to the correct principle of government. federalism separation of powers checks and balances divides the powers of government into different branches arrowright divides the powers of government between central and state governments arrowright each branch of government has certain powers that prevents the abuse of power on the people arrowright