Harriet Tubman's great-great-great-niece, Patricia Ross-Hawkins, gives a speech during the groundbreaking of the Harriet Tubman Underground Railroad State Park in CambridgeCAMBRIDGE, Maryland (Reuters) – Abolitionist Harriet Tubman's struggle to help roughly 70 slaves break out to freedom the usage of the Underground Railroad used to be remembered on Saturday on the groundbreaking of a Maryland state park in her honor. An escaped slave herself, Tubman toiled in bondage on the land in an effort to quickly be the 17-acre Harriet Tubman Underground Railroad State Park on the eastern shore of Maryland's Chesapeake Bay. Construction of the park on open marshland and forests in Dorchester County marks the one hundred-yr anniversary of the abolitionist leader's demise. …