Trump gloats on possible war crimes in Iran, but punishment distant

Threatening to destroy Iran's electricity grid and to reduce the country of 90 million to destitution, US President Donald Trump is shattering precedent by not just accepting but gloating about acts seen as potential war crimes.The consequences for Trump, at least in the near term, are probably none, experts say, as his administration works hard to undermine international institutions tasked with keeping norms.