He sought to allay any apprehensions on implementation of civil nuclear deal, saying there are "no irritants" at the government level.
"I had a very good meeting with President Barack Obama. The end result is in the Joint Statement (issued after the meeting on September 27)," Singh told media persons while returning from the US visit.
Talking about the Joint Declaration on Defence, he said, it is a "step forward" as "we are trying to move away from buyer-seller relationship to a relationship based on co-production, based on co-research".
The Prime Minister said the new decision in the field of defence is "in line with our own thinking" that India's domestic industry should be involved in research and production in a big way.
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He said the government would also like FDI to the extent of 26 per cent to come into defence production.
On the issue of civil nuclear deal, Singh noted that the early works agreement has already been signed between Nuclear Power Corporation of India Limited (NPCIL) and American firm Westinghouse.