Rare Piece Of American History On Display At Valley Forge National ParkValley Forge National Park will celebrate the Fourth of July on Thursday by displaying a true copy of the Declaration of Independence, one of only two known to exist.
The History Of July 4th4th of July means barbeques and fireworks. But it's also arguably the most important day in our country's history. Learn why.

More From CBS Philly

July 4th Desserts Full Of Red, White & Blue
Top 4th Of July Concerts

Listen Live