VIDEO: Fan Accompanies Billy Joel; 'Greatest Moment Of My Life,' He Says

By Mark Memmott

Published March 13, 2013 at 10:23 AM EDT

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Mark Memmott

Mark Memmott is NPR's supervising senior editor for Standards & Practices. In that role, he's a resource for NPR's journalists – helping them raise the right questions as they do their work and uphold the organization's standards.

See stories by Mark Memmott