<Tr> <Th> Topped - out </Th> <Td> May 10, 2013 </Td> </Tr> <Tr> <Th> Opened </Th> <Td> November 3, 2014 </Td> </Tr> <Tr> <Th> Cost </Th> <Td> US $3.9 billion </Td> </Tr> <Tr> <Th_colspan="2"> Height </Th> </Tr>

When will the new twin towers be finished