2pac

http://en.wikipedia.org/wiki/Tupac_Shakur

9/11

http://en.wikipedia.org/wiki/September_11,_2001_attacks

http://www.nytimes.com/2001/09/12/national/12PLAN.html?ex=1197781200&en=0bcfd1c3426f41fb&ei=5070

http://www.nytimes.com/2001/09/12/nyregion/12PLAN.html?ex=1197781200&en=15a038534d342071&ei=5070

Martin Luther King

http://nobelprize.org/nobel_prizes/peace/laureates/1964/king-bio.html

http://www.spartacus.schoolnet.co.uk/USAkingML.htm

http://en.wikipedia.org/wiki/Martin_Luther_King,_Jr.