[_djo_]

I agree that the topic is worthy of discussion, it's just that I disagree that the phrase you highlighted was more biased in favour of the US than your suggested edit. In both it is clear that the USAAF dropped the bomb.

The answer to your question is yes, inanimate objects can be responsible for outcomes. On a philosophical level, a rock that comes loose from a cliff face and kills someone driving on the road below is responsible for his death even though there was clearly no intention involved.

In terms of language, it's also common for an inanimate object to be the subject even if it was not the responsible party, i.e. 'the car hit the boy', 'the plane crashed into the tower', 'the house was destroyed by a bomb', etc. In none of those cases was the primary subject the entity which decided to cause the action.