<Tr> <Th> National Intelligence Agencies under the Department of Defense </Th> </Tr> <Tr> <Td> <Table> <Tr> <Td> </Td> </Tr> <Tr> <Td> Defense Intelligence Agency </Td> </Tr> </Table> <Table> <Tr> <Td> </Td> </Tr> <Tr> <Td> National Security Agency </Td> </Tr> </Table> <Table> <Tr> <Td> </Td> </Tr> <Tr> <Td> National Geospatial - Intelligence Agency </Td> </Tr> </Table> <Table> <Tr> <Td> </Td> </Tr> <Tr> <Td> National Reconnaissance Office </Td> </Tr> </Table> </Td> </Tr> <Table> <Tr> <Td> </Td> </Tr> <Tr> <Td> Defense Intelligence Agency </Td> </Tr> </Table> <Tr> <Td> Defense Intelligence Agency </Td> </Tr>

What is the mission of the department of defense