Members of the 1st Tennessee wait to take part in in a demonstration of a battle during ongoing activities commemorating the 150th anniversary of the Battle of Gettysburg, Friday, June 28, 2013, at at Bushey Farm in Gettysburg, Pa. Union forces turned away a Confederate advance in the pivotal battle of the Civil War fought July 1-3, 1863, which was also the war's bloodiest conflict with more than 51,000 casualties. (Photo by Matt Rourke/AP Photo)

Reenactors participate in a demonstration of a battle during the 150th anniversary of the Battle of Gettysburg, Saturday, June 29, 2013, at Bushey Farm in Gettysburg, Pa. The Union Army stopped a major Confederate advance during a battle fought July 1-3, 1863, often considered the war's major turning point. (Photo by Zach Gibson/AP Photo/Richmond Times Dispatch)

Mounted Union reenactors drill during ongoing activities commemorating the 150th anniversary of the Battle of Gettysburg, Thursday, June 27, 2013, in Gettysburg, Pa. (Photo by Matt Rourke/AP Photo)

A Floridian portraying a wounded soldier from the 1st N.C. Infantry takes part of demonstration of a Confederate field hospital during ongoing activities commemorating the 150th anniversary of the Battle of Gettysburg, Friday, June 28, 2013, at the Daniel Lady Farm in Gettysburg, Pa. (Photo by Matt Rourke/AP Photo)

A shopper views goods in one of the many tents selling items from boots made in them Civil War era maner to souvenirs at Bushey Farm during ongoing activities commemorating the 150th anniversary of the Battle of Gettysburg, Thursday, June 27, 2013, in Gettysburg, Pa. (Photo by Matt Rourke/AP Photo)

Reenactors demonstrate a cavalry battle during ongoing activities commemorating the 150th anniversary of the Battle of Gettysburg, Saturday, June 29, 2013, at Bushey Farm in Gettysburg, Pa. (Photo by Matt Rourke/AP Photo)

Women in Civil War era ball gowns help each other undress during ongoing activities commemorating the 150th anniversary of the Battle of Gettysburg, Saturday, June 29, 2013, at Bushey Farm in Gettysburg, Pa. (Photo by Matt Rourke/AP Photo)

Floridians portray wounded soldiers from the 1st N.C. Infantry as part of demonstration of a Confederate field hospital during ongoing activities commemorating the 150th anniversary of the Battle of Gettysburg, Friday, June 28, 2013, at the Daniel Lady Farm in Gettysburg, Pa. (Photo by Matt Rourke/AP Photo)

Mounted Union reenactors takes part in a demonstration of a battle during ongoing activities commemorating the 150th anniversary of the Battle of Gettysburg, Friday, June 28, 2013, at at Bushey Farm in Gettysburg, Pa. (Photo by Matt Rourke/AP Photo)

Reenacotrs demonstrate a battle during ongoing activities commemorating the 150th anniversary of the Battle of Gettysburg, Friday, June 28, 2013, at at Bushey Farm in Gettysburg, Pa. (Photo by Matt Rourke/AP Photo)

Confederate reenactors prepare for a demonstration of a battle during ongoing activities commemorating the 150th anniversary of the Battle of Gettysburg, Friday, June 28, 2013, at at Bushey Farm in Gettysburg, Pa. (Photo by Matt Rourke/AP Photo)

Reenactors demonstrate a cavalry battle during ongoing activities commemorating the 150th anniversary of the Battle of Gettysburg, Saturday, June 29, 2013, at Bushey Farm in Gettysburg, Pa. (Photo by Matt Rourke/AP Photo)

Reenacotrs demonstrate a battle during ongoing activities commemorating the 150th anniversary of the Battle of Gettysburg, Friday, June 28, 2013, at at Bushey Farm in Gettysburg, Pa. (Photo by Matt Rourke/AP Photo)

A mounted Confederate reenactor takes part in a demonstration of a battle during ongoing activities commemorating the 150th anniversary of the Battle of Gettysburg, Friday, June 28, 2013, at at Bushey Farm in Gettysburg, Pa. (Photo by Matt Rourke/AP Photo)

Union and Confederate re-enactors skirmish during a re-enactment of the Battle of Gettysburg in Gettysburg, Pennsylvania, on June 29, 2013. Some 8,000 re-enactors are participating in events marking the 150th anniversary of the July 1-3, 1863 Battle of Gettysburg, considered the turning point in favor of the Union in the American Civil War. (Photo by John Moore/Getty Images)

From left, Tommy White, Noah Raper and Jim Smith play drums during the 150th anniversary of the Battle of Gettysburg, Saturday, June 29, 2013, at Bushey Farm in Gettysburg, Pa. (Photo by Zach Gibson/AP Photo/Richmond Times Dispatch)