McLEAN, Va. – Abraham Lincoln's Gettysburg Address has inspired Americans for generations, but consider his jarring remarks in 1862 to a White House audience of free blacks, urging them to leave the U.S. and settle in Central America. "For the sake of your race, you should sacrifice something of your present comfort for the purpose of being as grand in that respect as the white people," Lincoln said, promoting his idea of colonization: resettling blacks in foreign countries on the belief that whites and blacks could not coexist in the same nation.