The Department of State negotiates treaties and other agreements with foreign nations. Since 1945 the United States has entered into treaties of collective security and mutual defense with a total of 42 nations. It speaks for the United States at the United Nations and other international organizations. During 1957 the United States was represented at more than 370 international conferences. Through our consulates general and consulates overseas the Department of State issues visaspassport endorsements required of aliens desiring to enter the United Statesto foreigners who qualify under the terms of our laws. Last year approximately 1 million visas were issued or renewed. Passport agencies in Washington. Los Angeles.