General David Petraeus indicated yesterday that the US has contingency plans to bomb Iranian nuclear facilities if diplomacy and sanctions fail. "They certainly can be bombed," he told CNN. "It would be almost literally irresponsible if Centcom were not to have been thinking about the various 'what ifs' and to make plans for a whole variety of different contingencies." Iran has claimed its nuclear development is for peaceful purposes. Petraeus predicted "a period of time, certainly, before all this might come to a head." (More David Petraeus stories.)