"Land of Hope and Glory" featured in the final concerts for 1928, 1929, 1936 and 1939. By then, audience participation in the second half of the programme had become a ritual, and from 1947 a boisterous "tradition" was created by the conductor Malcolm Sargent, making "Land of Hope and Glory" part of a standard programme for the event. The "Last Night of the Proms" was broadcast annually on television from 1953 onwards, and Promenaders began dressing up outrageously and waving flags and banners during the climax of the evening. In some years, "Land of Hope and Glory" and the other favourites were left out of the programme but reinstated after press and public outrage. In an exception, for the 2001 Last Night concert following the September 11 attacks, the conductor Leonard Slatkin substituted a more serious programme, featuring Samuel Barber's "Adagio for Strings", but despite the success of this occasion, the now traditional pieces returned the following year.