Complex sentence: The case and the trial of the main executioner of Khatyn was not given much publicity in the media; the leaders of the Soviet republics worried about the inviolability of international unity between the Belarusian and Ukrainian people.
Split into simpler sentences: The case and the trial of the main executioner of Khatyn was not acquired adequate publicity in the media. The leaders of the Soviet republics worried about the inviolability of international unity between the Belarusian and Ukrainian people.