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Roanoke Firearms owner John Markell holds a Glock 9 mm pistol. Photo: Don Petersen / AP

A Harvard Business School study found if all states adopted firearm purchase delay laws, an additional 910 lives could be saved each year, per CNN. The study suggests mandatory waiting periods allow a "cooling off" period for heightened emotions that could lead to crimes and suicide.

Why it matters: Most of the 33,000 gun-related deaths in the United States each year are suicides. Between 2006 and 2014, there were 190,396 people sent to the ER for handgun-related injuries; 55% of those were assault victims.

The studies: The researchers looked at the number of handgun-related homicides between 1970 and 2014 in states with mandatory waiting periods and those without, and found the laws were associated with "a 17% decrease in gun homicides and a 7% to 11% decrease in gun suicides," according to CNN. They also analyzed the impact of the Brady Handgun Violence Prevention Act — federal legislation that enacted a waiting period from 1994 to 1998 — and found a similar reduction in homicides related to firearms. The findings on suicide reduction need further research, the authors said.

The laws: 16 states and the D.C. have state regulated waiting periods. Hawaii requires two weeks for all firearm purchases, while Florida and Iowa require only three days for handgun purchases only, according to the Law Center to Prevent Gun Violence.

Go deeper

Supreme Court agrees to hear challenges to Texas abortion law

Photo: Saul Loeb/AFP via Getty Images

The Supreme Court on Friday agreed to hear two cases challenging Texas' abortion law, which bans the procedure as soon as six weeks into pregnancy, but left the law in place in the meantime.

Why it matters: The court is moving extraordinarily fast on the Texas case, compressing into just a few days a process that normally takes months. And that schedule means the court will take up Texas' ban a month before it hears another major abortion case — a challenge to Mississippi's ban on abortions after 15 weeks.

Officials warn 5 key tech sectors will determine whether China overtakes U.S.

Illustration: Aïda Amer/Axios

U.S. intelligence officials responsible for protecting advanced technologies have narrowed their focus to five key sectors: artificial intelligence, quantum computing, biotechnology, semiconductors and autonomous systems.

Why it matters: China and Russia are employing a variety of legal and illegal methods to undermine and overtake U.S. dominance in these critical industries, officials warned in a new paper. Their success will determine "whether America remains the world’s leading superpower or is eclipsed by strategic competitors."

4 hours ago - Health

Pfizer says COVID vaccine over 90% effective in kids

Photo: Michael M. Santiago/Getty Images

Pfizer and BioNTech said their COVID-19 vaccine was more than 90% effective at protecting children between the ages of 5 and 11 from symptomatic infections from the virus, according to a study posted online by the FDA Friday.

Why it matters: Pfizer is seeking an emergency use authorization to vaccinate children — one of the last groups of Americans still largely ineligible to receive a coronavirus vaccine.