Police were attacked with petrol bombs in a new outbreak of violence in parts of east and south Belfast tonight.
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The president-elect also warned US companies they would face "retribution" for setting up their business operations abroad.
Penalties of £100 or a court fine of up to £1,000 can now be handed to anyone caught lighting up in a private vehicle with someone under 18.
Bodies are being buried in backyards and overwhelming morgues as officials try to find another plot of land to lay them to rest.