<Tr> <Td> 1981--87 Nicaragua, Contras </Td> </Tr> <Tr> <Td> 1982 Chad </Td> </Tr> <Tr> <Td> 1991 Haiti </Td> </Tr> <Tr> <Td> 1996 Iraq coup attempt </Td> </Tr>

Who supported chile in 1973 to overturn the elected government and why