— Justin Trudeau (@JustinTrudeau) January 28, 2017GREEN CARD CONFUSIONConfusion abounded at airports as immigration and customs officials struggled to interpret the new rules. Some legal residents with green cards who were in the air when the order was issued were detained at airports upon arrival.However, senior administration officials said it would have been "reckless" to broadcast details of the order in advance.Other officials said green card holders from the affected countries would require extra screening and would be cleared on a case-by-case basis.Airlines were blindsided and some cabin crew were barred from entering the country.Travelers were handled differently at different points of entry and immigration lawyers advised clients to change their destination to the more lenient airports, said Houston immigration lawyer Mana Yegani.At Chicago O'Hare International Airport, brothers Bardia and Ayden Noohi waited for four hours for their father Kasra Noohi - who has an Iranian passport and a US green card - to be allowed through.They knew Trump had pledged tougher rules but did not expect the problems. "I didn't think he'd actually do it," Bardia Noohi, 32, said. "A lot of politicians just talk."Thousands of refugees seeking entry were thrown into limbo. Melanie Nezer of the Hebrew Immigrant Aid Society said she knew of roughly 2,000 who were booked to come to the United States next week.Trump's order indefinitely bans refugees from Syria. In a television interview, he said he would seek to prioritize Christian refugees fleeing the war-torn country.US officials, speaking on condition of anonymity, said they were not consulted on the action and in some cases only learned the details as they were made public.At the State Department, a senior official said lawyers were working to interpret the executive order, which allows entry to people affected by the order when it is in the "national interest."However, a federal law enforcement official said: "It's unclear at this point what the threshold of national interest is."