David Lang worked in New York City for a well-known photographer specializing in portraits and celebrity shoots, but moved on to work for the International Organization for Migration. He documented the organization's relief efforts following the tsunami in Sri Lanka. He also worked with UNICEF in the Maldives, and Internews in Pakistan.
David has an interesting collection of galleries of his work in Pakistan, Afghanistan, and Morocco...for TTP, I chose to highlight his work on Street Photographers in Kabul. In many countries of the world, street photographers perform their craft in cities' streets, on corners and in "holes-in-the-wall", and they provide a public service by producing passport-sized photos for IDs etc.
Afghanistan is one of these countries, as well as India, and a myriad of others. The technique in processing the prints is -by our digital standards- prehistoric, and may well be considered as a dying art.
My thanks to Emmanuelle Rey for the link to David's work.