Climate Change Threatens Hidden History Of Black Cemeteries

Historic Black cemeteries in Virginia are being threatened by erosion and invasive species as archaeologists try to unearth their history.

Amid the Potomac's waves to freedom and an abundance of monuments and museums lies another piece of history in the nation's capitol. 

"This vault dates back prior to 1850 and was part of the underground railroad," Lisa Fager said. 

Fager runs the Mount Zion and Female Union Band Society cemeteries.