President Donald Trump on Saturday was photographed wearing a mask during a visit to the Walter Reed National Military Medical Center, after months of refusing to don the medical expert-recommended face coverings meant to help slow the spread of the coronavirus.

"I love masks in the appropriate locations," Trump said, speaking to reporters at the White House before his visit.

Thomas Chatterton Williams, along with more than 150 prominent journalists, authors and writers, published a letter decrying what it called the "intolerant climate that has set in on all sides" of debate in Harper's Magazine on Tuesday, fueling a heated controversy over free speech, privilege and the role of social media in public discourse.

Nearly four months after it closed over coronavirus concerns, Disney World is once again inviting guests to experience its Florida theme parks.

The reopening comes as Florida is experiencing a surge of new coronavirus cases, with more than 10,000 being reported on Saturday.

Both Magic Kingdom and Disney's Animal Kingdom opened Saturday to the general public, following limited openings for annual-pass holders and employees. The other two area parks — Epcot and Disney's Hollywood Studios — are expected to open on Wednesday.

Updated at 9:20 p.m. ET

As Zuleika Yusuf Daffala walks across Kibera, one of the big informal settlements in Kenya's capital, she greets dozens of kids on the streets. Some are jumping rope, others chasing each other through the alley and another group is trying to make a tiny cooking pan out of an aluminum can.

Ants do it. Lobsters do it. Even equatorial mandrills do it. Why don't many Americans do it: Wear masks and keep a wise social distance from each other?

Scientific American reports this week how several animals seem to know how to take precautions and keep their distance so they're less likely to be infected by a peer.