Drowning history: Sea level rise threatens US historic sites

FILE - In this Feb. 22, 2007 file photo, Faneuil Hall, right, one of the sites on Boston's Freedom Trail, sits among buildings on an evening in downtown in Boston. With scientists forecasting sea levels to rise by anywhere from several inches to several feet by 2100, historic structures and coastal heritage sites around the world are under threat. A multidisciplinary conference is scheduled to convene in Newport, R.I., this week to discuss preserving those structures and neighborhoods that could be threatened by rising seas. (AP Photo/Michael Dwyer, File)