For those of you in the U.S. with the day off, Happy MLK, Jr. Day.  To be honest I never really took the time to celebrate this day before, and in the past just treated it as a lucky day off.  But at a time when many people in the U.S. are made to feel like second-class citizens (like the whole population of Puerto Rico) and African Americans are still discriminated and shot at by our own police, I feel it especially important to remember of all that MLK, Jr. stood for and how he got his social progress. 

So in celebration of the day and the man, may I suggest watching David Letterman's Netflix Special, My Next Guest Needs No Introduction, featuring a great interview with Barack Obama.  Also learn a little bit more about MLK, Jr. himself here.