Burj khalifa

ABU DHABI, United Arab Emirates - There's no greater symbol of the shifting fortunes in the Gulf than the surprise renaming of the world's tallest building in Dubai after the leader of neighboring Abu Dhabi, who bailed out the faltering city state.

DUBAI, United Arab Emirates - Dubai opened the world's tallest skyscraper Monday, and in a surprise move renamed the gleaming glass-and-metal tower Burj Khalifa in a nod to the leader of neighboring Abu Dhabi - the oil-rich sheikdom which came to its rescue during the financial meltdown.