His Highness Sheikh Khalifa bin Zayed Al Nahyan, Abu Dhabi Crown Prince and Deputy Supreme Commander of the UAE Armed Forces, yesterday walks past the world’s tallest flagpole after hoisting the national flag at the Abu Dhabi breakwater as part of the country's 30th National Day celebrations (picture WAM), as the largest UAE National Flag (right) adorns the night sky at the Union House in Dubai. ©Gulf News