According to Obozrevatel (in Russian), NTV has decided not to air a documentary on the investigation of Gongadze's murder today (Saturday), after receiving an order from the Kremlin to avoid this topic.

One of the people interviewed for the documentary, Yevgeniy Lauer, editor in chief of the Internet news site "Tribuna," allegedly spoke of Russia's involvement in Gongadze's case.

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It looks like NTV has replaced the Gongadze documentary with the one on Russian porn industry:

Extreme life of Russian porn actors: exhausting filming sessions and unprotected sex. And the majority of actors are family people. Is it easy to fulfill your marital responsibilities after a work like this? Why men in the porn business are paid less than women? [...]