Americans have long prided themselves on being a nation of risk-takers—from the earliest European immigrants (and the Native Americans who took a big risk letting them in) to the entrepreneurs of Silicon Valley. Maybe that’s why we’re inclined to celebrate the daredevils among us, whether they’re advancing science (like astronauts) or just performing goofy, though risky, stunts for our amusement (think flagpole sitters). Here are seven of the most remarkable daredevils in American history—men and women who bravely defied death, sometimes sacrificing their lives in the bargain.