Americans can travel almost anywhere they choose. But to protect its people, the government lists a few dangerous places where Americans cannot go. These places are unfriendly countries or countries at war. There, the travelers might not be safe. These countries are listed in a small book called a passport . This passport is a government request for the safety of its traveling people. It is also a government's pledge  that the people will obey the rules of the host country. To receive a passport from the government, a traveler must prove that he is an American citizen. An American cannot go abroad without a passport. Only certain close countries such as Canada and Mexico do not ask for passports Stuck  inside the passport is the traveler's picture. Children traveling with their parents are included in one parent's book. Thousands of people from the United States visit other countries every year. An American traveler might carry plane tickets, money, clothing and many other things. But the most important thing that he carries in another country is his passport. Why does a traveler need a passport?
It helps the country to protect the people It helps the traveler to know where he will go He needs to have his picture taken more often He needs something more to carry when he travels