<Tr> <Th> Callsign </Th> <Td> <Ul> <Li> CSM: America </Li> <Li> LM: Challenger </Li> </Ul> </Td> </Tr> <Ul> <Li> CSM: America </Li> <Li> LM: Challenger </Li> </Ul> <Li> CSM: America </Li> <Li> LM: Challenger </Li>

When was the last time somebody landed on the moon