As he took his seat in an interrogation room at Calgary International Airport, Moe Toghraei felt little cause for alarm. A wastewater management engineer based in Madison, Wisconsin, he had returned to Canada, where his wife and children lived, for a few weeks last October for a routine visit. Now, he was heading back to Wisconsin for work.
![U.S , Calgary International Airport, Canada](https://static.wixstatic.com/media/df4247_ec073596393a413397eb4d10202613d5~mv2.jpg/v1/fill/w_974,h_597,al_c,q_85,enc_auto/df4247_ec073596393a413397eb4d10202613d5~mv2.jpg)
Travelers to the U.S. from the Calgary airport go through customs and passport control at a U.S. Customs and Border Protection checkpoint at their point of departure, in Canada, before boarding. Toghraei, 53, a Canadian citizen of Iranian background, had gone through this process many times before without incident.
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