American civil religion paper

Analyze Martin Luther King and his Letter from a Birmingham Jail in relation to the idea of American civil religion. Directly engage the material from the course to explain the idea of American civil religion. What evidence suggests that King stands within this civil religious tradition? In what ways do you see him revising or extending this tradition?
Letter from a Birmingham Jail:http://abacus.bates.edu/admin/offices/dos/mlk/letter.html