A minutes silence followed by the ringing of 26 bells was heard in Newtown, Connecticut, one week after a gunman broke into Sandy Hook Elementary school and shot 20 young children and six of their teachers.
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The island of Kivalina in Alaska is quickly disappearing into the ocean, watched by its 400 residents, due to climate change.
German Chancellor Angela Merkel has called on fellow European nations to share the burden of the influx of migrants.
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