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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.

Recreational marijuana use is a step closer to being legal in Canada, after the House of Commons approved the Cannabis Act on Monday. The legislation is now in the Senate, where it has been the subject of debate and proposed amendments.

"The Senate had proposed 46 amendments to The Cannabis Act but the Liberal government rejected several major ones last week," the CBC reports, "including one provision that would have affirmed the provinces' right to ban home cultivation of marijuana."

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.

The U.S. stock market fell sharply early Tuesday morning 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 was down about 1.2 percent, or more than 300 points, on pace for its sixth straight daily drop.

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.

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.

A record number of people have been forcibly displaced by war, violence and persecution, according to a new report from the U.N. High Commissioner for Refugees. 68.5 million people were forcibly displaced in 2017, setting a new record for the fifth straight year. 138,700 unaccompanied and separated children sought refuge and asylum in 2017, according to the agency.