The ADA requires the removal of barriers that deny individuals with disabilities equal opportunity and access to jobs, public accommodations, government services, public transportation, and telecommunications. Hope that helps!!
Before the Bill of Rights, people could be suspected and accused of a crime without determining whether is was true. Not everyone had a right to a trial where they could defend themselves or be defended by a lawyer before they were punished. The Bill of Rights has influenced the coined phrase "Innocent until proven guilty." It also allows people who believe their trial was unfair to request a new one so they can be fairly judged.