This week, by announcing 50,000 body cameras for US police, Barack Obama vows to use his two years left in office to prevent a repeat of the fatal Ferguson killing. Next, Bill Cosby's reputation is further dented after a lawsuit is filed accusing him of sexual abuse against a minor back in 1974. Finally, the rapid retreat of tropical glaciers across the Andes provides an inescapable truth for UN climate delegates in Lima.

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