Thirty people became U.S. citizens in a special ceremony on the 51st anniversary of Dr. Martin Luther King Jr.'s "I Have a Dream" speech.
The naturalization ceremony took place Thursday morning at King's memorial in Washington, D.C.
The new citizens represented 28 countries. León Rodríguez, the director of Citizenship and Immigration Services, delivered the Oath of Allegiance.
On Aug. 28, 1963, King stood at the steps of the Lincoln Memorial and delivered the iconic speech, with its ringing refrain, "I have a dream," to more than 250,000 civil rights activists and supporters gathered for the March on Washington for Jobs and Freedom.
The march became a critical turning point in the civil rights movement, and King's speech became known as one of the greatest in American history.
Last year, tens of thousands of people gathered on the National Mall to commemorate the 50th anniversary of King's speech.