<Li> "Do - Re-Mi"--No. 88 </Li> <P> In 1966, American Express created the first Sound of Music guided tour in Salzburg . Since 1972, Panorama Tours has been the leading Sound of Music bus tour company in the city, taking approximately 50,000 tourists a year to various film locations in Salzburg and the surrounding region . Sing - along Sound of Music revival screenings began in London in 1999, leading to a successful run at the Prince Charles Cinema which is ongoing as of 2016 . During the screenings, audience members are often dressed as nuns and von Trapp children and are encouraged to sing along to lyrics superimposed on the screen . In July 2000, Sing - along Sound of Music shows opened in Boston and Austin, Texas . Some audience members dressed up as cast members and interacted with the action shown on the screen . The film began a successful run at the Ziegfeld Theatre in New York City in September 2000, with the opening attended by cast members Charmian Carr (Liesl), Daniel Truhitte (Rolfe), and Kym Karath (Gretl). Sing - along Sound of Music screenings have since become an international phenomenon . </P> <P> In 2001, the United States Library of Congress selected the film for preservation in the National Film Registry, finding it "culturally, historically, or aesthetically significant". The Academy Film Archive preserved The Sound of Music in 2003 . </P> <P> The first American television transmission of The Sound of Music was on February 29, 1976 on ABC, which paid $15 million for a one - time only broadcast that became one of the top - rated films ever shown on television to that point . The movie was not shown again until NBC acquired the broadcast rights and telecast the film on February 11, 1979 . NBC continued to air the film annually for twenty years . During most of its run on NBC, the film was heavily edited to fit a three - hour time slot--approximately 140 minutes without commercials . The thirty minutes edited out of the original film included portions of the "Morning Hymn and Alleluia" sung by the nuns, part of the dialogue between Mother Abbess and Maria in the abbey, part of Liesl and Rolfe's dialogue preceding "Sixteen Going on Seventeen", Liesl's verse of "Edelweiss" sung with the Captain, the Captain and Baroness waltzing at the party, and minor dialogue cuts within existing scenes . </P>

How many von trapps are there in the movie