Smith and Mr. Halloran, speaking through representatives, and Ms. Jasmin, speaking briefly at a news conference, pledged to wage vigorous battles to clear their names.

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Speaking briefly in Spanish, he addressed Mexican migrant workers "who are working really hard for this great country", telling them that Mexico admires them and misses them and would work hard for their rights and for their families at home.

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The German government briefly arrested a man they said had been speaking to the driver of the truck carrying cooking oil that exploded, whom they suspect of being the perpetrator.

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