1.   Four people were arrested in the elaborate scheme in which immigrants recited the Pledge of Allegiance, took a citizenship oath and answered questions about American history.

2.   Four people were arrested in the scheme, which included immigrants reciting the Pledge of Allegiance, taking a citizenship oath and answering questions about American history.

3.   The citizenship oath requires one to renounce allegiance to all other countries.

4.   The U.S. citizenship oath requires that a person renounce allegiance to all other countries.