A group of U.S. citizens returning to Miami International Airport from Cuba, where they had taken part in events marking the 100th anniversary of Fidel Castro's birth, were held and questioned by U.S. officials over the weekend of August 15-16. Some travelers were required to surrender their cell phones, laptops, and other electronic devices for inspection, according to U.S. officials who spoke to The Associated Press. Everyone was later released and allowed to enter the United States, with no criminal charges filed, in what officials described as a temporary secondary screening at the border.