10 things you need to know: Today's guide to the obscure, the possibly relevant & things in between

1) A study released in advance of the 150th anniversary of the tragic night, April 14, 1865, that John Wilkes Booth slipped into Ford's Theater and shot President Lincoln reveals another tragedy: Lincoln, and much of his legacy, is being lost to the ages. According to Daniel Burnett, director of communications at the American Council of Trustees and Alumni, half of the American public today doesn't know when the Civil War took place. One in five Americans failed to identify John Wilkes B