Martin Kaste

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Investigators are blaming human error for the panic-inducing false missile alert in Hawaii last month. They say it was sent out by a state emergency management worker who mistook an exercise for a real attack.

At the same time, the incident has exposed what may be a more widespread problem: disagreement over whose job it should be to warn the public about missile attacks.

"Why did he even have a gun?" — it's a common refrain in America, often after mass shootings by people who legally aren't supposed to have firearms.

One of the worst recent examples was the massacre in a Sutherland Springs, Texas, church last November, in which 26 people were killed by a man whose domestic violence conviction should have barred him from buying guns.

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The jitters over North Korea's missile tests have led Hawaii to bring back air raid sirens. The state already has sirens in place in case of tsunami, but starting this month the state will once again test the "wailing tone" meant specifically to warn of attack.

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Any American who pays attention to law enforcement has heard of the strategies: "broken windows," "stop and frisk," "zero tolerance." These are all variations on what's broadly known as "proactive policing": efforts to seek out and prevent the causes of crime before it happens, as opposed to a more reactive policy of just sending police when called.

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A controversial alt-right political rally planned for San Francisco on Saturday afternoon has been canceled. Organizers announced the decision Friday afternoon, saying hostility from local politicians and leftist activists made the situation too dangerous. But concerns about protests on both sides linger, so the police remain on alert.

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And it just got a bit more difficult to buy illegal drugs and other contraband online. Attorney General Jeff Sessions made this statement today.

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It's rare for a law enforcement officer to be convicted of homicide for shooting someone while on duty. According to a new NPR data analysis, 2,400 people have been killed this way in the last two and a half years; the vast majority of those cases were found to be justified, but NPR found 20 officers who faced charges. Of those, six have been convicted or pleaded guilty.

On Monday, Seattle officials released dash cam audio of a Sunday morning police shooting that left Charleena Lyles, a pregnant mother of three, dead. The two Seattle police officers had been called to Lyles' apartment so she could report a burglary.

The shooting is under investigation by the Seattle Police Department's Force Investigation Team, and also SPD's Office of Professional Accountability, but here's what we know now:

Some conservatives have seized on Wednesday's shooting of Republican Rep. Steve Scalise and three others as the latest example of what they see as rising political violence from the left. Fox News' Sean Hannity accused Democrats of "dehumanizing" Republicans, and the right-leaning Washington Times ran an editorial by a Tea Party activist that called leftist protests "the first skirmishes of the second American civil war."

Reality Winner, the government contractor accused of leaking a secret NSA report to the media, plans to enter a plea of not guilty, her lawyer Titus Nichols tells NPR.

She hopes to be released on bond Thursday.

Winner, 25, works for a private contractor, Pluribus International Corp., in Augusta, Ga., and is an Air Force veteran who speaks three languages. She was arrested Saturday.

As horrific as mass shootings are, they are outliers. The vast majority of gun deaths in America are either suicides or one-on-one shootings. Mass shootings represent a small fraction of deaths by firearm.

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There were shouting matches, even some violence, yesterday in Portland, Ore., when a group of President Trump supporters ran into angry counterdemonstrators. Here's NPR's Martin Kaste.

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