Many Indians felt that Obama gave too much deference to China during his recent Asia trip, setting off doubts about whether the US is on India's side. Indian Prime Minister Manmohan Singh arrives at the White House Tuesday.
Iran appeared to understand there was new urgency on the nuclear issue, agreeing at the Geneva talks to open its second enrichment facility to inspectors.
The real test, caution some, is whether Iran follows through on the tentative nuclear deal that would effectively prevent Tehran from developing a bomb.
The talks in Geneva were historic, but some experts say Iran gained prestige without having to concede much.
At a midday break, diplomats said the tone has been "civil" but a US official says Iran's delegation lacks the 'cohesion and confidence' to make a deal.
The US is prepared to expand and toughen existing sanctions if Iran does not reverse course on its nuclear program.
But the Oct. 1 meeting may simply set the stage for the US to seek tougher sanctions against Tehran for its nuclear program.
Residents suspect the involvement of widely resented security forces. But protests may not derail the relative peace of recent years.