How or what did Martin Luther King Jr. do to help the bridge of selma? And how did he help with the bloody sunday on march 7, 1965?

Answer 1

http://en.wikipedia.org/wiki/Martin_Luther_King%2C_Jr.

Check the contents section and click on the sections of his life you need more information about. Be sure you also check on the references and external links at the bottom of the page.