PHILADELPHIA (AP) – A U.S. appeals court will hear arguments Friday over a lawsuit filed by a college student handcuffed at a Philadelphia airport and questioned for hours about his Arabic language flash cards.

A federal judge has refused to drop the lawsuit filed by Nicholas George of Wyncote, then a student at Pomona College in California. The judge’s ruling says the 22-year-old was polite throughout and made no threatening remarks.

But federal agents have appealed the decision, prompting Friday’s hearing before the 3rd U.S. Circuit Court.

The American Civil Liberties Union represents George. Their lawyers say he was questioned, handcuffed, marched through the airport and kept in a holding cell for four hours by agents concerned about the flash cards and a book critical of U.S. foreign policy.

George says he was studying Arabic.