The Department of Homeland Security has announced it will negotiate with 11 airports, located in Bogotá, Buenos Aires, Mexico City, Rio de Janeiro, São Paulo, Edinburgh, Milan, Rome, Keflavik, Osaka, and St. Maarten, to open preflight inspection offices.  At these “preclearance” locations, Customs & Border Protection agents inspect travelers for immigration, customs and agriculture requirements before they board U.S.-bound flights.  With successful preflight screening, a foreign traveler normally avoids all screening at his or her U.S. destination airport.  In 2015, DHS opened preclearance negotiations, which are still underway, with 9 European countries and the Dominican Republic.  See our earlier blog entry.  Only 15 preclearance locations currently exist:  in Canada, the Caribbean, Ireland, and the United Arab Emirates.