Khalifa sent the United Arab Emirates Air Force to support the military intervention in Libya against Muammar Gaddafi, alongside forces from NATO, Qatar, Sweden and Jordan. Khalifa pledged the full support of the UAE to the Bahrain in the face of pro-democracy uprising in 2011. Later that year Khalifa was ranked as the world's fourth-wealthiest monarch, with a fortune estimated to be worth $15 billion. In 2013, he commissioned Azzam, the longest motor yacht ever built at long, with cost between $400–600 million. In January 2014, Khalifa had a stroke and was reported to have been in a stable condition after undergoing an operation. During his presidency in February 2022, the UAE signed partnership agreements with Israel on tourism and healthcare. Personal life Khalifa was the eldest son of Zayed bin Sultan Al Nahyan and Hassa bint Mohammed bin Khalifa Al Nahyan. He was married to Shamsa bint Suhail Al Mazrouei, and had eight children: Sultan, Mohammed, Shamma, Salama, Osha, Sheikha, Lateefa and Mouza. Investments and foreign aid Seychellois government records show that since 1995 Sheikh Khalifa has spent $2 million buying up more than 66 acres of land on the Seychelles' main island of Mahé, where what was to be his palace is being built. The Seychelles' government has received large aid packages from the UAE, most notably a $130 million injection that was used in social service and military aid, which funded patrol boats for the Seychelles' antipiracy efforts. In 2008, the UAE came to the indebted Seychelles government's aid, with a $30 million injection. Sheikh Khalifa paid $500,000 for the 29.8-acre site of his palace in 2005, according to the sales document. A Seychelles planning authority initially rejected the palace's building plans, a decision overturned by President James Michel's cabinet. A month after the start of construction of the palace, the national utility company warned that the site's plans posed threats to the water supply. Joel Morgan, the Seychelles' minister of the environment, said the government did not tender the land because it wanted it to go to Sheikh Khalifa. Morgan said "the letter of the law" might not have been followed in the land sale. In February 2010, the sewage system set up by Ascon, the company building the palace, for the site's construction workers overflowed, sending rivers of waste through the region, which is home to more than 8000 residents. Local government agencies and officials