Updated at 9:30 a.m. ET Wednesday

Since early May, 2,342 children have been separated from their parents after crossing the Southern U.S. border, according to the Department of Homeland Security, as part of a new immigration strategy by the Trump administration that has prompted widespread outcry.

Here's what we know about the policy, its history and its effects:

Does the Trump administration have a policy of separating families at the border?

Yes.

A Look At Social Media Finds Some Possible Benefits For Kids

Jun 19, 2018

Screen time is often considered the enemy when it comes to teaching kids to be active and well-behaved. But should all forms of media be considered equal?

Research being presented Tuesday finds that for 9- and 10-year-old children taking part in a study of brain development, greater social media use, such as using scrolling through Instagram and texting, was associated with some positive effects, including increased physical activity, less family conflict and fewer sleep problems.

Copyright 2018 Fresh Air. To see more, visit Fresh Air.

DAVE DAVIES, HOST:

Updated at 9:05 p.m. ET

President Trump told House Republicans that he will support them "1,000 percent" in their efforts to pass immigration legislation later this week. Republicans left the wide-ranging talk in the Capitol in good spirits but still unsure if they have the votes to pass a bill.

Updated at 8:05 p.m. ET

Recreational marijuana may soon be legal in Canada, after both the House of Commons and the Senate approved the Cannabis Act. Legal sales are likely to begin before the end of summer after the Senate voted 52-29 Tuesday night to approve the bill, the CBC reports.

If you've heard any of rapper Cardi B's recent string of hits, you know the woman has expensive taste. The Bronx-born star loves Balenciaga, Prada and Gucci. But true fans know that for years she's been one of the most visible spokespeople for a brand that's far more affordable: Fashion Nova, a popular retailer known for being sexy, cheap, and worn by celebrities.

Updated at 4:31 p.m. ET

The U.S. stock market fell sharply Tuesday in response to President Trump's recent threats to add another layer of tariffs on $200 billion worth of Chinese goods.

The Dow Jones industrial average closed down 287 points, or about 1.15 percent, marking its sixth straight daily drop. The broader S&P 500 index lost 11 points, or about 0.4 percent.

Updated at 1 p.m. ET

First ladies have a long history of advocating for issues important to them, often issues related to children. But what's unusual is to have all the living former presidents' wives speaking out in one voice.

America's current and former first ladies are pushing back against the Trump administration's practice of separating children from their parents at the border in an effort to curb illegal crossings.

New genetic tools are making it easier and cheaper to engineer viruses and bacteria, and a report commissioned by the Department of Defense has now ranked the top threats posed by the rapidly advancing field of "synthetic biology."

One of the biggest concerns is the ability to recreate known viruses from scratch in the lab. That means a lab could make a deadly virus that is normally kept under lock and key, such as smallpox.

Kansas cannot require people to prove their U.S. citizenship before they can vote, a federal judge says, ruling that the state's election law is unconstitutional. The judge sharply criticized Kansas Secretary of State Kris Kobach, who has based much of his political career on worries about voter fraud.

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