Federal (Union) officers listen to the national anthem before the final battle of the Gettysburg conflict, "Pickett's Charge," between Confederate and Federal (Union) soldiers as part of re-enactment activities, July 7, 2013, recognizing the 150th anniversary of the US Civil War battle in Gettysburg, Pennsylvania. Gettysburg officials are expecting 250,000 visitors to visit the small south-central Pennsylvania borough of about 7,700 residents for the anniversary. [Photo/Agencies]