International warranty on Cannon / Nikon / Sony

Hi, a couple months back I posted about ideas for DSLR / mirrorless camera.
One of my friends is going to the US this month. Given the that difference between India and US is around 25%, I am considering ordering from the US.

But as I am a complete novice, so I am quite worried about only US warranty. Is are there online stores that offer international warranty in the US where I can order from?

Thanks