Amazing Americans

How did the contributions of famous and amazing Americans make the United Stets and the world a better place? What did they all have in common that helped them make a contribution? Please think about the presidents such as George Washington, Abraham Lincoln, John F, Kennedy, Ronald Reagan, and Barack Obama. Also think about Harriet Tubman, Martin Luther King, Jr. Rosa Parks, Condoleezza Rice, Hillary Clinton, Sonia Sotomayor, Helen Keller, Sally Ride, John Glenn, Neil Armstrong, Tomas Rivera, Sacajawea, Squanto, Chief Joseph and Ira Hayes.