President Obama speaks at a naturalization ceremony for 24 members of the United States Armed Forces. The ceremony recognizes the contributions made by immigrant members of the U.S. armed forces who have earned their American citizenship through service to our country, and the contributions immigrants from all walks of life have made to our country throughout its history. Alejandro Mayorkas, Director of U.S. Citizenship and Immigration Services (USCIS) presents the home countries of the candidates for citizenship, and DHS Secy. Janet Napolitano administers the oath of citizenship. President Obama also presents Sgt. Ledum Ndaanee, USMC (E-5) with the Outstanding American by Choice recognition, which highlights the outstanding achievements of naturalized U.S. citizens.