Dick’s Sporting Goods, the largest sporting goods retailer in the United States, announced Wednesday it would no longer sell assault-style weapons in response to the recent deadly school shooting in South Florida. The company also announced it would raise the minimum age for all gun sales to 21 and would not sell high-capacity ammunition magazines.

Amazon is teaming up with Berkshire Hathaway and JPMorgan Chase to form a new company that could disrupt the U.S. healthcare industry in the same way the online retailer has changed the way consumers buy just about everything. The new venture, as yet unnamed, will help employees of all three companies find reasonably priced healthcare services. “The ballooning costs of [healthcare] act as a hungry tapeworm on the American economy,” Berkshire founder Warren Buffett said in a prepared statement. “Our group does not come to this problem with answers.

Retail sales in the United States jumped 4.9 percent this year during the Christmas season, the largest increase since 2011, according to the latest Mastercard SpendingPulse report. A strong economy and growing consumer confidence helped to fuel retail spending, said analysts, noting retailers benefited from Christmas falling on a Monday this year, giving shoppers a full weekend for last-minute gift buying.

Atlanta-based Chick-fil-A answered the call from the city’s mayor and came to the rescue Sunday night to help feed thousands of stranded travelers at powerless Hartsfield-Jackson Atlanta International Airport. “The mayor called about 10 p.m. and asked for assistance,” Chick-fil-A said in a statement.

Thousands of people remain stranded after Hartsfield-Jackson Atlanta International Airport lost power Sunday, grounding more than 1,000 flights. Electricity went out around 1 p.m. due to a fire at an underground power facility, according to Georgia Power. Electrical service was restored and lines were long but moving Monday morning as passengers boarded planes, attempted to reschedule flights, and picked up baggage. Delta Air Lines, with its largest hub in Atlanta, offered passengers a free one-time change to their flights.

Managers closed a mall south of Birmingham, Ala., early Thanksgiving night after several fights broke out among shoppers hunting for Black Friday deals. Police in the town of Hoover denied reports of gunfire outside the mall, saying firecrackers likely caused the popping sounds.

Uber acknowledged on Tuesday it covered up a year-old hacking attack that compromised the personal information of more than 57 million riders and drivers. So far there is no evidence that the data was misused, according to ride-hailing service’s CEO, Dara Khosrowshahi, in a posting on Uber’s website. The hackers took the names, email addresses, and mobile phone numbers of riders and drivers from around the world, and the driver’s license numbers of at least 600,000 U.S. drivers.