The new face of labor Meet the woman who's been called "the most powerful labor leader in the country": Sara Nelson, president of the Association of Flight Attendants-CWA, a working mother who has led her organization representing nearly 50,000 flight attendants at 20 airlines through turbulent times for the aviation industry. She talks with Lesley Stahl about her call to arms in the face of a government shutdown earlier this year; demands for safety in the air; and the prospects of America's labor movement in a climate where the rules often cater to the front office and Wall Street.