National

Five months after climbing a stone wall to enter the White House grounds, Curtis Smith used a knife to slash at a sheriff's deputy at an entrance to the Chester County, Pa., courthouse on Tuesday. The guard shot and killed Smith.

Here's part of a statement released by Chester County District Attorney Tom Hogan:

Stock prices took another beating Tuesday, with all major stock measures falling.

Two closely followed market indicators, the Dow Jones industrial average and the S&P 500, each fell roughly 1.3 percent, despite opening the day with big gains.

This huge summer sell-off must mean the U.S. economy is sinking, right?

Well, so far at least, that's not right. In fact, the economy has been improving, and Tuesday brought yet more evidence of that. Here are some highlights:

I stepped out my parents' front door last Thursday, expecting a typically glorious summer day in southern Oregon. Instead, I was hit with acrid wood smoke that stung my eyes and throat. The air was thick with haze that obscured the mountains. I quickly retreated inside.

Health departments across the West are mobilizing to protect residents from smoke generated by dozens of fires that have sent smoke as far east as the Midwest.

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JOE GONZALES: Park your car at Harvard Yard.

ROSS HENDERSON: I parked my car on Harvard Yard.

LINDA PAOLERA: Park your car in Harvard Yard.

PETER VALERIE: Park your car in Harvard Yard. They occasionally will say, you have an accent.

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So that's how Ted Cruz is trying to stand out in the crowded GOP field. And now NPR political editor Domenico Montanaro is here to talk about how some of the others are working to differentiate themselves. Hey there, Domenico.

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