Need a high res. picture of a crowd?

I'm making a poster about civil disobedience and I drew a huge picture of Gandhi and I want to put a picture of a giant crowd behind him, preferably of people from India. I need a high resolution picture that I can cut in half and print out in two pieces so that it will take up as much room as I need it to without the picture printing pixelated...any help would be appreciated!! thanks!