New Delhi, Jan 26 (Agencies):  As India celebrates its 62nd Republic Day on Wednesday, the R-Day parade began at Rajghat--the heart of the capital. The parade had 'mini-India' in itself.

Marching down from the Raisina Hills to Red Fort, the parade showcased India's 'unity in diversity' and the military might as thousands of spectators along the eight km long route cheered the marching contingents and the mechanised columns.

The march-past was watched by the Republic Day chief guest Indonesian President Susilo Bambang Yudhoyono, Vice President Hamid Ansari, Prime Minister Manmohan Singh, Defence Minister A K Antony and the country's top political and military brass.

The well turned out and synchronised military and police contingents led by General Officer Commanding (Delhi) Maj Gen Manvendra Singh marched proudly to the lilting tunes of bands through the Rajpath where President and Supreme Commander of Armed Forces Pratibha Patil took the salute.

The capital had turned into a security fortress for the event as unmanned aerial vehicles (UAV) and helicopters scanned the capital from air, snipers kept a hawk-eye vigil from rooftops and armed personnel at "every corner" provided a ground-to-air security apparatus.

Minutes before the parade began, Singh, Antony and chiefs of Army, Navy and Air Force laid wreaths at 'Amar Jawan Jyoti', the British-era World War-I memorial at India Gate, where an eternal flame burns in memory of those who laid down their lives while defending the nation's frontiers.

The parade began shortly after Patil and her Indonesian counterpart arrived at the Rajpath escorted by the President's 46 bodyguards riding well-trained and impeccably-bedecked horses.

After the President unfurled the tricolour and a customary 21-gun salute, an Army doctor Major Laishram Jyotin Singh was awarded posthumously the highest peacetime gallantry award -- the Ashok Chakra -- for his bravery while fighting militants during an attack on Indians in Kabul. He was the first Army doctor receiving Ashok Chakra.

Four Mi-17 helicopters then zoomed in from the western skies and showered flower petals on the spectators, signaling the beginning of the parade followed by the winners of the Param Vir Chakra and Ashok Chakra and mounted columns of 61 Cavalry.

The Army showcased its impressive weaponry which included advanced Brahmos Launcher System, T-90 Bheeshma tanks, Brahmos Launcher System, Multi Barrel Rocket System 'Pinaka' and Tactical Control Radar 'Reporter'.

They also displayed NBC (Nuclear- Biological-Chemical) Reconnaissance Vehicle, indigenous Pontoons Movable Section Bridge, Integrated Network Platform and armoured troop carrier Prahar 510.

Showcasing its air power, Army's also conducted a flypast of three advanced light helicopters Dhruv in arrowhead formation.

The army contingent from Punjab Regiment, Rajputana Rifles, Rajput Regiment, Sikh Light Infantry, Jammu and Kashmir Light Infantry and Gorkha Rifles marched to the tunes of 'Gangotri', 'God of War', Pragati and 'Vir Bharat'.

The next to follow were smartly-dressed 148 Navy personnel and then the Air Force marching to the tunes of Jai Bharati and Sound Barrier. While the Navy showcased aircraft carrier INS Viraat, IAF's marching contingent showcased the tableaux of Airborne Early Warning and Control System (AWACS) and Aerostat Radar.

The Defence Research and Development Organisation (DRDO) brought the Active Phased Array Radar, which is a shipborne multi-function radar, and Naval Underwater Weapon System at the parade for the first time along with the trainer version of Light Combat Aircraft Tejas.

87-year-old M M Shukla, the flying officer of Royal Air Force based in Rawalpindi during the World War II, who is the oldest participant in this year's parade, then led the ex-servicemen contingent to a huge applause from the spectators.

Other marching contingents were those of camel-mounted BSF, Assam Rifles, Coast Guard, CRPF, ITBP, CISF, SSB, RPF, Delhi Police, NCC and NSS.

Following the country's armed and police forces came the country's rich cultural diversity in full display in 23 tableaux -- 13 from states and ten from ministries. This time, the number of tableaux has risen to 23 from last year's 21 to provide a kaleidoscopic view of the vibrant cultural heritage.

Rabindranath Tagore, Lord Buddha, Jammu and Kashmir's Bandh Pandher, Tripura's Kharchi festival, Punjab's Mehandi ceremony and Bihar's Maner Sherif were among the focus areas of tableaux from various states.

The first to be rolled out was the one on 'Gurudev' Rabindranath Tagore by Culture Ministry and Sangeet Natak Akademi to commemorate the Nobel laureate's 150th birth anniversary.