How did his descriptions differ from ideas that you may already have had about Afghanistan? What cultural differences become evident in the American passages of the novel?

Khaled Hosseini vividly describes Afghanistan, both the privileged world of Amir's childhood and the stricken country under the Taliban. How did his descriptions differ from ideas that you may already have had about Afghanistan? What cultural differences become evident in the American passages of the novel? How easy do the Afghans find it to settle in the U.S.? Compare the social structures of Amir's life in Afghanistan vs. those he encounters in America.