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Copyright 2016 NPR. To see more, visit http://www.npr.org/.

The head of the beleaguered Transportation Security Administration told lawmakers on Capitol Hill Wednesday the long passenger lines at screening checkpoints at Chicago's O'Hare International Airport this month should have been avoided. He also said it was a "failure" on the part of the agency to get some things done.

Texas, joined by a number of other states, has filed a lawsuit against the Obama administration in response to its directive that public schools allow students to use the bathroom that corresponds to their gender identity.

The plaintiffs include Alabama, Wisconsin, West Virginia, Tennessee, Oklahoma, Louisiana, Utah, Georgia, the governor of Maine and the Arizona Department of Education.

Secretary of State John Kerry has negotiated himself into the odd position of lobbying in support of investment in Iran.

As he tries to keep the Iran nuclear agreement on track in the final year of the Obama administration, Kerry has become personally involved in trying to help Iran get economic benefits out of the deal. That's no easy task and one that critics say is letting Iran off the hook.

During her tenure as secretary of state, Hillary Clinton violated department policies when she used a personal email account to conduct official business, a new report from the Office of the Inspector General for the State Department found.

The report, which was obtained by NPR's Susan Davis ahead of its public release, reads:

Native American leaders and a U.S. State Department official are urging a French auction house to call off a sale of sacred art and artifacts.

House Speaker Paul Ryan shot down reports Wednesday that he was on the verge of endorsing Donald Trump for president.

Whenever I'm out reporting in the field, I can tell many ranchers have a powerful connection with their cattle — it seems they can almost understand them. But researchers today are digging deeper to figure out exactly what cows are saying — and how they communicate through their moos.

I drove out to the research farm at the University of Missouri to ask cattle geneticist Jared Decker to share his expert insights.

Rose has dealt with depression since high school. She'd put her head down, focus on school and get through. But during her senior year of college, Rose couldn't even concentrate on school anymore.

"I was struggling. I was feeling depressed. I was feeling isolated," Rose, now 24, says. "I was crying at Cheerios commercials, which is not normal."

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