Khalifa bin Zayed Al Nahyan was the President of the United Arab Emirates (UAE) and the ruler of Abu Dhabi from 2004 until his passing in 2022. He succeeded his father, Zayed bin Sultan Al Nahyan, the founding father of the UAE. Khalifa played a significant role in the country's development, focusing on economic diversification and modernization. Under his leadership, the UAE saw substantial growth in sectors like tourism, finance, and renewable energy. Khalifa was also known for his philanthropic efforts, supporting various initiatives in education, healthcare, and humanitarian aid both locally and internationally.