No victory in Iraq, says Petraeus

The outgoing commander of US troops in Iraq, Gen David Petraeus, has said that he will never declare victory there.

In a BBC interview, Gen Petraeus said that recent security gains were "not irreversible" and that the US still faced a "long struggle".

When asked if US troops could withdraw from Iraqi cities by the middle of next year, he said that would be "doable".