Ahmed Mohamed, right, shows the clock he built in a school pencil box while standing with his father Mohamed Elhassan Mohamed after a news conference in Dallas, Monday, Aug. 8, 2016. The family of Ahmed Mohamed, who was arrested after bringing the homemade clock to school and charged with having a hoax bomb, filed a federal lawsuit Monday against Texas school officials and others, saying they violated the 14-year-old boy’s civil rights. (AP Photo/LM Otero)