The 68th Republic Day celebrations began in the national capital on Thursday, with Abu Dhabi Crown Prince Mohammed bin Zayed Al Nahyan the Chief Guest at the annual parade.The national flag is unfurled along with 21-gun salute at Rajpath.The highlights of this year's Republic Day parade include a 149-member United Arab Emirates Presidential Guard, the Air Force, the Navy and Army contingent led by a UAE band consisting of 35 musicians marching on Rajpath and presenting a ceremonial salute to the President of India.