Victim families demand answers in Mexico train crash; officials promise investigation

Survivors and families of the victims of a deadly train crash in southern Mexico are demanding answers as the government vows ...
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ABC David Muir fans fume 'It's unacceptable' as he halts show for harrowing breaking news

It was an intense show for ABC World News Tonight viewers as host David Muir halted the show for some terrifying breaking news that caused a divide among fans. From a harrowing cargo plane crash in ...