Before Gideon v. Wainwright (1963), Gideon was a criminal, who was too poor to hire a lawyer. Gideon was sentenced to jail, but he appealed to the Supreme Court. The Supreme Court ruled contrary to the Florida court (which ruled that only ones who can pay for a lawyer can have one), that everybody was to be given a lawyer no matter if they can pay or not.
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The different branches of the government help limit the power of the federal government because there are checks and balances with each branch and if one branch doesn't quite agree with the executive branch then the two other branches can overrule the president's power.
Neither, in all honesty the amount of nuclear explosives both countries have they would completely destroy each other. There would be no winner
East and West Berlin were separated by the "Berlin Wall" during that Cold War that existed between the United States and Soviet Russia, since this was meant to keep people in East Berlin from fleeing to the western half.