Final answer:
Raúl Castro implemented economic and diplomatic changes after becoming president.
Explanation:
Raúl Castro made two significant changes after assuming the presidency following Fidel Castro's illness:
- Economic policies: Raúl implemented economic reforms aimed at liberalizing the Cuban economy, such as allowing limited private enterprise.
- Diplomatic relations: He engaged in improving relations with the United States and other countries, leading to the reestablishment of diplomatic ties with the US under President Obama.
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