Amid the grief in Brazil, there is a growing sense of anger over the nightclub fire that killed more than 230 people.
NBC Correspondent Keir Simmons is in Brazil. He says investigators have a long list of safety questions that need answering, including why did the nightclub apparently have only one exit? And did security staff briefly block exits to stop people leaving without paying their drink bills?
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It comes as the country faces a major migrant crisis with more than 62,000 stranded including outside the port of Piraeus.