Emily Sullivan

Updated 9:45 p.m. ET

Hawaii residents and tourists alike were shaken shortly after 8 a.m. local time Saturday when a push notification alerted those in the state to a missile threat, causing an immediate panic until officials confirmed it was a false alarm.

"BALLISTIC MISSILE THREAT INBOUND TO HAWAII. SEEK IMMEDIATE SHELTER. THIS IS NOT A DRILL," read the message, which also blared across Hawaiian televisions stations.

In a decision that may have sweeping effects, a judge has allowed an 11-year-old Illinois girl to use medical marijuana at school.

Updated 1:40 p.m. ET on Sunday

The death toll rose to 20 on Sunday as authorities ramped up search and rescue efforts for those missing in the deadly mudslides in Santa Barbara, Calif. And hope of finding the four remaining missing persons alive, five days after storm devastated the region, is vanishing.

As midnight strikes on New Year's Eve, many minimum wage workers will have an extra reason to celebrate: They'll be getting a raise.

In 18 states and 20 localities, lawmakers are forcing up the minimum wage on Jan. 1.

For years, a large number of state and local governments have been driving up wages in response to federal inaction. Congress has kept the federal minimum wage at $7.25 an hour since 2009.

Drones are continuing to take off as Christmas gifts.

This holiday season, shoppers will buy nearly 1.6 million drones, up 31 percent from last year, according to the Consumer Technology Association.

But on Christmas morning, remember this warning: If they weigh more than 0.55 pounds, the high-flying gadgets have to be registered with the Federal Aviation Administration.

A registrant must attach a drone ID number, linked to the owner's name and address, and pay a $5 fee.

Kaspersky Lab, a massive, Russian cybersecurity company, sued the Trump administration in U.S. federal court on Monday, arguing that the American government deprived it of due process rights when Homeland Security Secretary Elaine Duke banned its software from U.S. government agencies in September.

Many potential emergency room patients are too sick to drive themselves to a hospital. But an ambulance can cost hundreds or thousands of dollars without insurance.

This where a popular ride-sharing app can step in, while also freeing up the ambulances for those who need them most.

John Skipper has resigned from his top position at ESPN and co-chairmanship of the Disney Media Networks. Skipper had recently signed a contract extending his leadership to 2021.

"Today I have resigned from my duties as President of ESPN," Skipper said in a statement released on Monday. "I have had a wonderful career at the Walt Disney Company and am grateful for the many opportunities and friendships."

Graduate students nationwide can breathe a sigh of relief: Their tuition waivers won't be taxed after all.

A provision in the Republican House tax plan had originally proposed taxing grad students' tuition waivers as income. It was a controversial proposal and sent a wave of anxiety across campuses, leading to protests at dozens of universities.

In an effort to curb a reputation of faulty policy enforcement — and to "make Twitter a safer place" — Twitter says it will enforce a fresh set of guidelines to reduce abusive and violent content, beginning today.

The new rules target hate symbols, abuse and unwanted sexual advancements. One clause effectively prohibits accounts from associating with hate groups:

Archaeologists recently unearthed a curious artifact in California: An Egyptian sphinx.

Unlike the Great Sphinx of Giza, which was made of bedrock, this sphinx was made from plaster. And it wasn't carved by the ancient Egyptians, but molded by designers on the set of Cecil B. DeMille's 1923 biblical film The Ten Commandments.

For the first time since the Cold War, Hawaii residents heard a nuclear attack warning siren test.

Siren tests for natural disasters like hurricanes are routine events in Hawaii, but on Friday, the Hawaii Emergency Management Agency added a new tone signaling nuclear threat.

The death toll in what Somalis have described as their 9/11 has risen even higher.

On Oct. 20, the government said the toll had reached 358, making it Somalia's deadliest terrorist attack ever. The Zobe Rescue Committee, created by the Somali government in the wake of the attack, spoke with relatives of those at the denotation sites in efforts to establish a more accurate death toll.

Now, the committee reports that 512 people were killed, 312 were wounded, and that 62 remain missing, according to The Associated Press.

Graduate students around the country walked out of their classes, office hours, and research labs to protest the House Republican tax plan Wednesday.

"This plan is going to be disastrous for higher ed," said Jack Nicoludis, a Harvard graduate student in chemistry, who helped organize a protest on the campus. He said the bill would more than double his taxes.

Editing down your thoughts to cram them into a single tweet can be painful. Now, Twitter users might find that process half as painful.

In early September, Twitter announced it was moving on from its "arbitrary" 140-character limit by doubling the amount of characters a tweet can contain to 280.

Some users were instantly skeptical — after all, they had signed up for a website whose defining features were, as its founder and CEO Jack Dorsey noted, brevity and speed.

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