The visa issuance process is widely recognized as an integral part of immigration control and border security. Foreign nationals (i.e., aliens) not already legally residing in the United States who wish to come to the United States generally must obtain a visa to be admitted. Applying for a visa is the first gateway for foreign nationals to seek admission to the United States, and the data collected as part of that process forms the core of the biometric and associated biographic data that the United States collects on foreign nationals. This book examines visa security policies, as well as countries and visa categories that are subject to the most fraud; State's use of technologies and resources to combat fraud; and training requirements of State officials responsible for fraud prevention.