<Tr> <Td> South Africa </Td> <Td> Skukuza </Td> <Td> Skukuza Airport </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> South Africa </Td> <Td> Sishen </Td> <Td> Sishen Airport </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> South Africa </Td> <Td> Upington </Td> <Td> Upington Airport </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> Swaziland </Td> <Td> Manzini </Td> <Td> King Mswati III International Airport </Td> <Td> </Td> <Td> </Td> </Tr>

When was airlink formed and for what purpose