Colin Dwyer

Updated at 7:40 p.m. ET

Walmart and Dick's Sporting Goods say they won't sell guns to customers under 21, and both are putting new restrictions on ammunition sales.

Dick's Sporting Goods, one of the largest sports retailers in the U.S., has announced it is immediately ending its sales of military-style semi-automatic rifles and is requiring all customers to be older than 21 to buy a firearm at its stores. Additionally, the company no longer will sell high-capacity magazines.

Updated at 7 p.m. ET

Court documents say the suspect in the shootings at a South Florida high school has confessed to investigators. Nikolas Cruz, 19, has been booked on 17 charges of premeditated murder at Broward County's Main Jail in Fort Lauderdale, Fla.

Updated Feb. 7 at 3:55 p.m. ET

Daniel Zwerdling, a longtime investigative correspondent with NPR, has retired after a tenure spanning nearly four decades. The network's announcement Tuesday coincided with published allegations of sexual harassment against the Peabody-winning journalist, including claims of unwanted kisses and inappropriate conversations.

Zwerdling, for his part, has publicly stated the allegations are false.

You'd be forgiven if you went to bed early having chalked up another win for New England.

Updated at 7:25 p.m. ET

Ursula K. Le Guin, a prolific novelist best known for the Earthsea series and The Left Hand of Darkness, died Monday at the age of 88. Across more than 20 novels and scores of short stories, Le Guin crafted fantastic worlds to grapple with profoundly difficult questions here on Earth, from class divisions to feminist theory.