Imagine arriving at the airport to travel to the United States to negotiate a contract having a flourishing US company. Landing this contract will make a fantastic deal of gain for your own European company. You have taken the necessary precautions to guarantee a smooth trip: came early for your trip, supported that the Electronic System for Travel Authorization ("esta") application you created last season remains legal, and also book your hotel and car leasing in the USA well beforehand. But when you reach the check-in counter, the flight broker starts questioning a recent business trip you took into the Middle East. After a little discussion, the broker apologizes and informs you that you're unable to board the flight, and therefore are not eligible to travel under the Visa Waiver Program. In shock, you must return to your home, possibly miss out on business in the USA, and handle the practice of getting a US visa.