Unlike the original kiosks, these use a facial scan to confirm your identity when you arrive at a customs hall kiosk; they also eliminate paper receipts that travelers previously used to show agents.
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Global Entry provides expedited U.S. customs screening for international air travelers when entering the United States. Global Entry members also receive TSA PreCheck® benefits as part of their membership.
Of course, you'll also need to be arriving from a flight abroad, but at least you can complete the interview without an appointment. It is possible to handle the Global Entry walk-in interview on arrival if you plan.
According to a New York Times article, 3 to 5 percent of the 30,000 Global Entry traveler applications submitted each month are rejected. Most common reason? Criminal background checks come up with some sort of red flag that causes the application to be rejected prior to any interview.