US President Barack Obama has attended India’s Republic Day parade in Delhi, the first US head of state to do so.
Mr Obama was chief guest at the annual military parade. He arrived on Sunday for a three-day visit seen as a sign of warming ties between the two countries.
After talks on Sunday, both sides announced a breakthrough on a pact that will allow US companies to supply India with civilian nuclear technology.
Indian PM Narendra Modi said it was a “new journey” of co-operation.
Mr Obama will meet the main opposition Congress party leaders later on Monday and will also speak at a business summit.
Republic Day marks the adoption of India’s constitution in 1950, three years after independence from Britain.
Uniformed soldiers in colourful headgear marched down Rajpath, or King’s Avenue, where Mr Obama watched the parade with Mr Modi inside a bullet-proof glass enclosure.
The BBC’s Sanjoy Majumder in Delhi says the ceremony showcased India’s military might with soldiers marching in formation and the latest weapons on display, including several made in America.
Helicopters showered petals on the crowds and brass bands and dancers filed past the guests on a foggy, rainy morning.