Russia-Ukraine war: What happened today (April 20)
A roundup of key developments and the latest in-depth coverage of Russia's invasion of Ukraine.
World News
A fake cyberwar held in Estonia could help nations prepare for real life threats
From the tiny Baltic nation of Estonia, some 30 nations are participating in mock cyberwar exercises. While the annual NATO-led exercise may be fiction, the threat emanating from Russia is very real.
The number of people fleeing Ukraine has surpassed 5 million
The U.N. had initially estimated that 4 million Ukrainians would flee Russia's war — a number that was exceeded last month. Overall, more than 10 million people have been displaced by the conflict.
Ukrainians wait in line for hours to buy commemorative Snake Island postage stamps
The stamps honor the Snake Island soldiers who answered a Russian calls to surrender with "Russian warship, go f*** yourself!" Ukraine's postal service had to limit purchases to six stamps apiece.
To fight climate change, and now Russia, too, Zurich turns off natural gas
Zurich, Switzerland, is shutting down the gas supply to some neighborhoods. Originally aimed at fighting climate change and saving money, it's also a step to cut gas imports from Russia.
Wimbledon bans Russian and Belarusian players — including No. 2 Medvedev
The British tournament becomes one of the first tennis events to suspend players from the two countries since Russia invaded Ukraine, and excludes several highly ranked players from competition.
Meet Patron, a bomb-sniffing Jack Russell terrier who has become a Ukrainian hero
Two-year-old Patron works with rescuers in the northern city of Chernihiv, where he sniffs out Russian bombs (in addition to warming laps, nipping sleeves and generally being a good boy).
Julian Assange is one major step closer to extradition to the U.S.
A British judge on Wednesday formally approved the extradition of Julian Assange to the United States to face spying charges. The case will now go to Britain's interior minister for a decision.
A 4-year-old can run errands alone ... and not just on reality TV
A Japanese TV show now on Netflix, 'Old Enough!,' has sparked much debate about the wisdom of allowing very young kids to be very independent. Risky? Beneficial? Child development experts weigh in.
Ukrainian band DakhaBrakha delivers an urgent message to U.S. audiences
This "ethno-chaos" group brings sophisticated music and strong anti-Putin messages to their listeners at home and abroad, as "ambassadors of free Ukraine." They're currently on a U.S. tour.