United States officials denied a Palestinian student’s request to enter the country this month. The student was planning to attend classes at Harvard University. Some Americans are calling what happened to him an example of overly invasive safeguards at U.S. border checkpoints. Ismail Ajjawi was refused entry after landing last week at Boston’s airport in Massachusetts. The 17-year-old said his denial was linked to political messages published by his friends on social media. A U.S. Customs and Border Protection official, however, would not confirm the information. The official told The Associated Press that the decision to cancel Ajjawi’s visa was based on information discovered during an inspection. The official added, he can still try to reapply for his visa to enter the country.