columbia university history professor eric foner and university of iowa history profession linda kerber argue discuss the 15th amendment and the birthright. they argue it changed history for the better and that it is unique to the united states. this is half an hour. >> american history tv is in milwaukee at the organization of american historians annual meeting and we're joined by professor eric foner from columbia university and linda kerber with the university of iowa. thanks to both of you for joining us. you'll be talking about at this conference about birthright citizenship and the 14th amendment. why don't you set the stage for us, mr. foner, and what is birthright citizenship? >> in a nutshell, this is the principle that any person born in the united states, regardless of the status of their parents, their ancestor, regardless of their race, gender, religion, any other category, is a citizen of the united states just by have i chew of being born here. of course you can also become a citizen by naturalization if you're an immigrant. but i think historically, the important point i