The ailing ruler of the United Arab Emirates, Sheikh Khalifa bin Zayed Al Nahyan, a key figure in his country’s history and one of the world’s richest monarchs, died on Friday, the state-run Emirates News Agency reported. He was 73.
No cause of death was given, but Sheikh Khalifa had a stroke in 2014 and subsequently stepped back from many of his public duties. The government announced that government offices and private businesses would close for three days beginning Friday and that a…