One student is dead and eight are injured in a shooting at a Colorado school.

"I heard a gunshot," said Makai Dixon, 8, a second grader who had been training for this moment, with active shooter drills and lockdowns, since he was in kindergarten. "I’d never heard it before."

A year after Trump withdrew from the Iran nuclear deal, and following new US sanctions, Tehran announces it will no longer commit to portions of the agreement, pressuring other signatories to protect Iran against sanctions.

Reversing an earlier decision, a federal appeals court rules the White House can continue to send asylum seekers back across the US-Mexico border until their immigration hearings.

Lyft and Uber drivers are striking today in multiple cities in protest of pay decreases and job conditions.

Visualizing the current wave of US job creation—according to companies, only 787 jobs can be attributed to Trump.

As Democrats in Congress fight to end the use of "dark money," liberal groups are using those same funds to help 2020 candidates.

Electability [is] tied to the gender-specific sparking of joy in the scrotum. Unconscious bias is running for president.

Secretary of State Mike Pompeo says disappearing Arctic ice is "opening new passageways and new opportunities for trade" and could "potentially slash the time it takes to travel between Asia and the West by as much as 20 days."

Breaking its record from a year ago, Britain has gone more than four days without using coal to generate its electricity.

Orcas are starving off the Washington coast. A Native tribe is giving them live salmon, and calling for more feeding stations.

Year after year, Donald Trump may have lost more money than nearly any other individual taxpayer. This is among the findings of a New York Times investigation into Trump's taxes between 1985 and 1994. See the five big takeaways here.

Imagine that a grocer got a tax deduction every time someone returned a box of cornflakes to his store. Heartbeats are when the grocer asks a friend to buy all the boxes and return them, just to pocket more deductions. The “heartbeat” tax dodge employed by ETFs added up to a $23 billion no-interest loan from the US Treasury to investors.

Los Angeles is suing H&R Block and Intuit, alleging they've been "actively undermining public access to the IRS's Free File program."

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“All I wanted was for people to take me seriously. They treated me like a rational human being, and they never laughed at me. I saw the way you and Dad looked at each other and tried not to smile when I said something. I could hear you both in your room at night, laughing at me.” How a 13-year-old, vulnerable and seeking validation, became radicalized into the alt-right.

Nazi propaganda didn't suppress news, but rather "tightly controlled its flow...and denied access to alternative sources."

The internet has delivered much-needed support to those with cancer, which is exactly why "Munchausen by internet" has thrived.

America's genetic privacy laws are a mess, all because your data can be used for purposes beyond its original intended use.

“I see patients who come in with a whole bag of supplements they’re taking—an immune booster, something for hair, something for vision—but if you look at the ingredients, someone is taking three or four things with vitamin A, and all these can add up.” Among the reasons supplements can be dangerous: Taking multiple vitamins increases the chance for toxic overlap.

A possible cobalt trove sits 1,000 miles off Brazil; whether it's a sunken continent will determine if Brazil can claim it.

That Starbucks cup that was left in a Game of Thrones scene would have cost at least $250,000 in product placement. Also, it’s already been edited out of the episode.

An argument for bellicosity in philosophy boils down to: If you don't lose, you'll never learn.

This week's ambience: White noise simulating an oil platform in the Arctic.

The step-by-step manual used by US astronauts for the first moon landing is going up for auction.