It's Martin Luther King, Jr. Day here in the United States.  For many, it's just another day; for some, it's an extra day to frolic in weekend activities; for others still, it's a day to remember a great man. 

We hear a lot about Martin Luther King, Jr.  Like any historical figure some things are true, some are not.  That's what is so great about letters.  We can read a letter and catch a glimpse of the real man...

...letters such as this one, written from a Birmingham jail.