From slavery to freedom

4. The American artist who painted "the Problem We All Live With" in 1964.
5. the Jim crow...
9. Barack Obama was the first American black...
10. the last name of the Civil Rights activist who met Barack Obama at the White House in 2011.
11. the 44th US president.
13. ...but equal
14. places where the slaves worked.
17. Comparative of superiority of "clean"
19. separation between Black people and white people in the US until 1964.
20. Black people have always suffered from inequality in that part of the US from 1620 to 1964.

1. the name of the character responsible for the laws authorizing segregation.
2. Martin Luther King, Jr had a ...
3. Black people who worked for no pay during nearly 250 years in the south of the USA.
6. D.C. the capital of the Us and the place where MLK Jr delivered his famous speech.
7. the city where Martin Luther King, Jr was born.
8. A white man ... Martin Luther King, Jr in Memphis
12. the president who abolished slavery in the US.
14. Martin Luther King, Jr's job
15. Martin Luther King, Jr wanted everybody (Whites and Blacks) to be ....
16. the city where Martin Luther King, Jr was assassinated.
18. the last name of the person who refused to give up her seat in a bus in 1955.