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Scientists have been able to make and study human embryos in their labs for decades. But they have never been able to keep them alive outside a woman's womb for more than about a week.

That limitation meant scientists were unable to conduct a range of detailed research into early human development.

But now researchers say they have discovered a way to keep human embryos alive in the laboratory about a week longer than ever before, and through a critical period of development.

Impressed, we are. With your #StarWarsDay celebrations, that is. The fourth is strong on the Interwebs.

It's a time for Star Wars-themed treats.

(Even here at NPR.)

And an excuse to show your creative side.

Of course, even this sacred day is not free of the presidential campaign.

Homeland Security Secretary Jeh Johnson says he's "acutely aware" of longer wait times at airports, and now he's boosting staffing at checkpoints, hoping to avoid even longer wait times that had been projected for this summer.

The move comes after officials predicted "long waits in epic lines," as NPR's Marilyn Geewax reported in March.

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

A court in Jerusalem sentenced an Israeli man to life in prison on Tuesday for masterminding the kidnapping and killing of a 16-year-old Palestinian in 2014. The murder escalated tensions in the lead-up to that summer's Gaza war.

As the Two-Way has reported, Mohammed Abu Khdeir "was kidnapped off an East Jerusalem street and put in a car. He was then taken to a forest outside the city, beaten, doused with gasoline and burned to death."

Saying "colleges have been treated as sanctuaries of learning where firearms have not been allowed," Georgia Gov. Nathan Deal vetoed a bill Tuesday that would have allowed licensed owners to carry guns on campus in all but a few buildings.

The "campus carry" legislation, HB 859, would have allowed guns on campuses and in buildings owned by any public college, technical school or other institution, providing exceptions only for areas used for athletic events, dormitories, and fraternity and sorority houses.

From Texas Standard:

Texas led the country in exonerations last year, with 54 statewide. in the state. New York placed a distant second with only 17, according to the National Registry of Exonerations latest report.

Ted Cruz suspended his presidential bid Tuesday night after a disappointing Indiana loss, clearing the way for Donald Trump to be the likely Republican nominee.

"From the beginning I've said that I would continue on as long as there was a viable path to victory," Cruz told supporters gathered in the Hoosier State. "Tonight I'm sorry to say it appears that path has been foreclosed."

"With a heavy heart but with boundless optimism for the long-term future of our nation, we are suspending our campaign," he said.

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