Entering the United States

International attendees to APS events should prepare for their trip to the United States by familiarizing themselves with policies and procedures for entering the country, including information on the Visa Waiver Program and customs.

Visa Waiver Program

Under the Visa Waiver Program (VWP), citizens of certain countries may travel to the United States for tourism or business purposes—for stays of ninety days or less—without obtaining a visa. Please note that there are certain passport requirements when using the VWP.
Visa Waiver Program

Electronic System for Travel Authorization
Anyone traveling under the Visa Waiver Program must apply for "Travel Authorization" online using the the Electronic System for Travel Authorization (ESTA). Travelers must apply for "Travel Authorization" at least seventy-two hours before travel to the United States.
Electronic System for Travel Authorization Process

Office of Biometric Identity Management

The Office of Biometric Identity Management (OBIM), formerly US-VISIT, analyzes travelers to the United States by collecting biographic information and biometrics (i.e., digital fingerprints and photographs). 
Office of Biometric Identity Management

US Customs and Border Protection

Information for international visitors to the United States including travel tips, prohibited and restricted items, what to declare at customs, and online arrival/departure forms.
CBP For International Visitors

Department of Homeland Security's Travel Redress Inquiry Program (DHS TRIP)

DHS TRIP is a central point of contact for international travelers "who experience repeated referrals for security screenings or who believe that they have been denied boarding or entry into the United States because of inaccurate or incorrect information."
DHS TRIP Website