<Table> <Tr> <Th> Rebuilding of the World Trade Center </Th> </Tr> <Tr> <Th> One WTC </Th> </Tr> <Tr> <Td> <Ul> <Li> Construction </Li> <Li> In popular culture </Li> </Ul> </Td> </Tr> <Tr> <Th> 2--7 WTC </Th> </Tr> <Tr> <Td> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> <Li> 5 </Li> <Li> 7 </Li> </Ul> </Td> </Tr> <Tr> <Th> Other elements </Th> </Tr> <Tr> <Td> Liberty Park National September 11 Memorial & Museum Performing Arts Center Transportation Hub Vehicular Security Center Westfield World Trade Center St. Nicholas Greek Orthodox Church </Td> </Tr> <Tr> <Td> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> </Td> </Tr> </Table> <Tr> <Th> Rebuilding of the World Trade Center </Th> </Tr> <Tr> <Th> One WTC </Th> </Tr> <Tr> <Td> <Ul> <Li> Construction </Li> <Li> In popular culture </Li> </Ul> </Td> </Tr>

Why would there be an anchor under the world trade center site