There he had treated many victims of improvised explosive devices, the crude home-made bombs. In 2009 he became the first Sikh in the US military to receive permission to wear a beard and turban, according to The New York Times.
On Wednesday, the spotlight was shone on three leaders from the Indian American community recognising their rising role in the US.
The president of the Center for American Progress Action Fund, Neera Tanden, spoke of her own family's difficulties and how she was helped by the US government programmes that Clinton wanted to preserve and strengthened.
Representative Ami Bera of California was on stage to demonstrate the party's diversity in Congress. Raja Krishnamoorthi, who is running for Congress from Illinois, was presented as a "New Leader of Tomorrow".