Sasan Karimi

Sasan Karimi is not mentioned in either of the provided news articles. Therefore, it is impossible to provide any information about their background, current relevance, or any recent events related to them based on the given context. The articles primarily discuss the political situation in Iran following the assassination of top leadership, the potential power vacuum, and the country's stance on US demands regarding uranium enrichment and ballistic missiles. They do not provide any information that would allow for a summary about Sasan Karimi.