<Table> <Tr> <Th> Child Agency </Th> <Th> Title of Head / Leader </Th> <Th> Incumbent </Th> </Tr> <Tr> <Td> Citizenship & Immigration Services Ombudsman </Td> <Td> Director </Td> <Td> Maria M. Odom </Td> </Tr> <Tr> <Td> Domestic Nuclear Detection Office </Td> <Td> Director </Td> <Td> James F. McDonnell </Td> </Tr> <Tr> <Td> Federal Emergency Management Agency </Td> <Td> Administrator </Td> <Td> Brock Long </Td> </Tr> <Tr> <Td> Federal Law Enforcement Training Centers </Td> <Td> Director </Td> <Td> Connie L. Patrick </Td> </Tr> <Tr> <Td> Management Directorate </Td> <Td> Under Secretary </Td> <Td> Russell Deyo </Td> </Tr> <Tr> <Td> National Protection and Programs Directorate </Td> <Td> Under Secretary </Td> <Td> Suzanne E. Spaulding </Td> </Tr> <Tr> <Td> Office for Civil Rights & Civil Liberties </Td> <Td> Officer </Td> <Td> Megan H. Mack </Td> </Tr> <Tr> <Td> Office of General Counsel </Td> <Td> General Counsel </Td> <Td> Stevan E. Bunnell </Td> </Tr> <Tr> <Td> Office of Health Affairs </Td> <Td> Assistant Secretary / Chief Medical Officer </Td> <Td> Kathryn Brinsfield </Td> </Tr> <Tr> <Td> Office of Intelligence and Analysis </Td> <Td> Under Secretary </Td> <Td> David Glawe </Td> </Tr> <Tr> <Td> Office of Legislative Affairs </Td> <Td> Assistant Secretary </Td> <Td> M. Tia Johnson </Td> </Tr> <Tr> <Td> Office of Operations Coordination </Td> <Td> Director </Td> <Td> Richard M. Chávez </Td> </Tr> <Tr> <Td> Office of Partnership & Engagement </Td> <Td> Assistant Secretary </Td> <Td> </Td> </Tr> <Tr> <Td> Office of Policy </Td> <Td> Assistant Secretary </Td> <Td> </Td> </Tr> <Tr> <Td> Office of Public Affairs </Td> <Td> Assistant Secretary </Td> <Td> </Td> </Tr> <Tr> <Td> Office of the Inspector General </Td> <Td> Inspector General </Td> <Td> John Roth </Td> </Tr> <Tr> <Td> Privacy Office </Td> <Td> Chief Privacy Officer / Chief FOIA Officer </Td> <Td> Jonathan R. Cantor </Td> </Tr> <Tr> <Td> Science & Technology Directorate </Td> <Td> Under Secretary </Td> <Td> </Td> </Tr> <Tr> <Td> Transportation Security Administration </Td> <Td> Administrator </Td> <Td> David Pekoske </Td> </Tr> <Tr> <Td> United States Citizenship and Immigration Services </Td> <Td> Acting Director </Td> <Td> James McCament </Td> </Tr> <Tr> <Td> United States Coast Guard </Td> <Td> Commandant </Td> <Td> Admiral Paul F. Zukunft </Td> </Tr> <Tr> <Td> U.S. Customs and Border Protection </Td> <Td> Acting Commissioner </Td> <Td> Kevin K. McAleenan </Td> </Tr> <Tr> <Td> U.S. Immigration and Customs Enforcement </Td> <Td> Acting Director </Td> <Td> Thomas D. Homan </Td> </Tr> <Tr> <Td> United States Secret Service </Td> <Td> Director </Td> <Td> Randolph D. Alles </Td> </Tr> </Table> <Tr> <Th> Child Agency </Th> <Th> Title of Head / Leader </Th> <Th> Incumbent </Th> </Tr> <Tr> <Td> Citizenship & Immigration Services Ombudsman </Td> <Td> Director </Td> <Td> Maria M. Odom </Td> </Tr> <Tr> <Td> Domestic Nuclear Detection Office </Td> <Td> Director </Td> <Td> James F. McDonnell </Td> </Tr>

What is a major function of executive departments