AIDS. That, if it ever happens, will require effective vaccines, and those are years away.

ECONOMIST: Even in Africa, it can be won

Turning Rio de Janeiro into the next Oslo or Houston is a decade away, if it ever happens at all.

FORBES: Brazil Economy, Get Ready For The Correction

We know that if it ever happens again we can do something about it to help ourselves rather than wait for someone who may not turn up because they're too busy elsewhere.

BBC: Burstwick ?3m flood defence finished

It will take a long time before pride is fully restored, and, if this ever happens again, it will definitely not be soon.

CNN: Secret Service still the best and the brightest

Otherwise, the middle class will continue to languish with subpar wages at least until it becomes competitive again, if that ever happens.

FORBES: A "Generation of Sissies"