Ukraine and Russia are blaming each other for strikes around Zaporizhzhia nuclear plant in recent weeks, but why would anyone want to take such a risk?
Retired Colonel Hamish De Bretton-Gordon, a chemical weapons expert, says the risk of disaster "couldn't be higher" but that the plant is much newer than the infamous Chernobyl plant, with better-protected reactors.
However, the risk to the global environment remains a key question, as Russian claims to have placed explosives inside a reactor.
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"If they blew up that, that could create a chain reaction that would put massive amounts of contamination all across Europe," he added, concerned such an incident would trigger NATO's Article V and demand a united military response.