I think that there's a power in that [information through tweets and sound bites ]. There's also a danger, what generates a headline or stirs up a controversy and gets attention isn't the same as the process required to actually solve the problem.

There may be no greater tribute to Steve Jobs' success than the fact that much of the world learned of his passing on a device he invented.

There's one issue that will define the contours of this century more dramatically than any other, and that is the urgent and growing threat of a changing climate.

In Iraq and Syria, American leadership - including our military power - is stopping ISIL's advance, instead of getting dragged into another ground war in the Middle East, we are leading a broad coalition, including Arab nations, to degrade and ultimately destroy this terrorist group.

To resolve this issue will require Iran to come to the table and discuss in a clear and forthright way how to prove to the international community that the intentions of their nuclear program are peaceful. [...] The question is going to be whether in these discussions they show themselves moving clearly in that direction.

For me, personally, the most difficult moments had to do with not just terrorist attacks, but also shootings.

For in Asia and around the world, India is not simply emerging; India has already emerged. And it is my firm belief that the relationship between the United States and India - bound by our shared interests and values - will be one of the defining partnerships of the 21st century. This is the partnership I have come here to build. This is the vision that our nations can realise together.