In the tight U.S. Senate race in Massachusetts, Democrat Elizabeth Warren has been playing defense because of allegations that she used her Native American heritage to advance her career.
Warren, the likely Democratic challenger to incumbent Republican Scott Brown, says she did not know that Harvard Law School touted her as a member of a minority group back in the 1990s, when the school's faculty came under criticism for being too white.
But Warren says that when she was growing up in Oklahoma, her family always told her that she's part Cherokee.
Since the 1900s, the country's most iconic bridges and skyscrapers have been put up by men who risked life and limb to connect steel beams hundreds of feet in the sky. Ironworkers come from all backgrounds, but a small Indian reserve outside Montreal has supplied the U.S. with a proud lineage of Mohawk ironworkers.