'Fly Girls': How 5 Daring Women Defied All Odds And Made Aviation History

Amelia Earhart may be the most well-known, but she was far from the only woman aviator to push the boundaries of her time. In his new book, "Fly Girls: How Five Daring Women Defied All Odds And Made Aviation History," Keith O'Brien profiles five female pilots of the 1920s and '30s who were willing to risk everything to prove that they could fly just as high, fast and far as the men.

Keith O'Brien, author of "Fly Girls: How Five Daring Women Defied All Odds And Made Aviation History." He tweets @keithob.