On this day: September 17

Published On: Sep 14 2012 01:49:58 PM CDT   Updated On: Sep 17 2013 01:00:00 AM CDT

The U.S. Constitution is signed, the Civil War sees the bloodiest battle in American history, the prototype space shuttle Enterprise is unveiled, and the Camp David Accords bring peace between Egypt and Israel, all on this day.

OTD September 17 - Allegheny Arsenal
43 / 46
Library of Congress

1862: The Allegheny Arsenal explosion near Pittsburgh results in the single largest civilian disaster during the American Civil War, leaving 78 workers dead. Pictured is a painting of the arsenal from 1814.

Upload Photos / Videos