John Avlon: I think the action that the city's taken will help. There was a spike in police killings last year, but that comes in the context of a fairly long-term decline in the numbers of Americans being killed by police officers. He says it's possible to look at cases like tiring impulses and assume that there's more of this stuff happening than used to be the case.
The response to the death of the 29-year-old has differed from that of previous cases of police killings; we ask what the tragedy indicates about how America deals with police violence. Our correspondent says a lawmaker’s murder in Afghanistan highlights the misery of women under the Taliban. And why a decades-old model of animal and human learning is under fire.
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