NEW YORK, NY - MARCH 09: David H. Koch (L) and Julia Flesher Koch attends the School of American Ballet 2015 Winter Ball at David H. Koch Theater at Lincoln Center on March 9, 2015 in New York City. (Photo by Andrew Toth/FilmMagic)
NEW YORK, NY - MARCH 09: David H. Koch (L) and Julia Flesher Koch attends the School of American Ballet 2015 Winter Ball at David H. Koch Theater at Lincoln Center on March 9, 2015 in New York City. (Photo by Andrew Toth/FilmMagic)