This kind of airlineGovernment cooperation has succeeded in reducing bordercrossing redtape along the worlds airways by about onethird since World War II. The most important single step in facilitating travel to the United States has been the adoption of an airline plan known as "preclearance." This is a procedure whereby visitors clear U.S. Public Health. agriculture quarantine. immigration and customs at their points of departure. rather than upon arrival in the United States. The benefits to the travelerthe visitor from a foreign landare numerous and important. Chiefly. it eliminates any possibility of delay or other inconvenience upon arrival in the United States.
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immigration