Tourism is the second largest source of foreign exchange for Cuba, behind only medical services abroad. But the industry has faced big setbacks in recent years, with the coronavirus pandemic and now Russia's invasion of Ukraine slowing the island's income from tourist activity. Since the Covid-19 pandemic hit, Russian tourists have become the single largest group of visitors to the island nation. But international sanctions against Russia over its invasion of Ukraine could have wide-ranging impacts on its Latin American allies such as Cuba, experts say. IMAGES AND SOUNDBITES