Starting from summer 2017 Brussels Airport (BRU) will introduce preclearance system for flights to the United States.
Update, 18th November: Brussels Airport denies that US Customs preclearence would start from the summer of 2017. According to spokeswoman Florence Mulch is no defined date yet.
La Libre reports that several US government employees will be seconded to Brussels. US Customs officers will be able to perform immigration paperwork and documents check on Belgian territory before flight takes off towards USA. Brussels Airport is just one of the airports chosen for this kind of preclearance in Europe – it will be also introduced in Amsterdam-Schiphol (AMS), Oslo-Gardermoen (OSL), Madrid-Barajas (MAD), Stockholm-Arlanda (ARN), Manchester (MAN) and London-Heathrow (LHR). Dublin (DUB) is currently the only airport in Europe that has this system available. But that will change very soon.