In Gaza I saw the suffering of children and the heroism of health workers trying to save them | Thienminh Dinh

If our leaders allow this massacre to pass without consequence or condemnation, it will reveal a disturbing truth about what the world is willing to accept

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Heroism is no longer an abstract concept to me - it looks like Ali, who once spotted a quadcopter circling Al-Aqsa hospital in central Gaza, where he'd dropped me off less than an hour earlier. When the first airstrike slammed into the building, Ali ran: not away from danger but towards it, risking his own safety for mine. That morning, as subsequent strikes rattled the walls around us and as I phoned my sister (Tell Mum and Dad I love them heaps - just in case"), Ali remained by my side.

Seldom in history have healthcare workers been called upon to risk their lives simply by reporting for duty.