CORRECTION APTOPIX Sept 11 20th Anniversary

From left, former President Bill Clinton, former first lady Hillary Clinton, former President Barack Obama, Michelle Obama, President Joe Biden, first lady Jill Biden, former New York City Mayor Michael Bloomberg, Bloomberg's partner, Diana Taylor, Speaker of the House Nancy Pelosi, D-Calif., and Senate Majority Leader Chuck Schumer, D-N.Y., stand for the national anthem at the National September 11 Memorial & Museum in New York.