Airs Tuesday, April 26, at 7 p.m.   Join NPR’s Audie Cornish and Scott Detrow for special coverage of the Connecticut, Delaware, Maryland, Pennsylvania and Rhode Island primaries. We'll have interviews with news makers, and we'll travel to each campaign as well as analysis from the NPR new team and expert from the field. 

Some call it Antietam. Others refer to it as Sharpsburg. Commentator Gary Joiner has this historical profile of the bloodiest single-day battle in American history.