Due to security concerns, U.S. visa applications are subject to a greater degree of scrutiny than in the past.  For many applicants, a personal interview is required as a standard part of visa processing.  It is therefore recommended that the visa application process be initiated well before your travel date.  International attendees requiring a visa to enter the United States should contact the nearest U.S. Embassy or Consulate. 

Locate the Embassy or Consulate Nearest you at:
http://travel.state.gov/travel/tips/embassies/embassies_1214.html 

View a List of Travel Wait Times for Interview Appointments at:
http://travel.state.gov/visa/temp/wait/tempvisitors_wait.php

Complete Visa Information is Available at:
http://travel.state.gov/visa/temp/temp_1305.html