Maria Aspin

But in the aftermath of Thompson's shooting, he adds, he expects more companies will take on those costs. Maria Aspin, NPR News, New York.

NYPD Commissioner Jessica Tisch says it has tracked the gunman's movements through video surveillance.

NYPD Commissioner Jessica Tisch says it has tracked the gunman's movements through video surveillance.

NYPD Chief of Detectives Joseph Kenney added that the NYPD has video of the suspect entering a Port Authority bus terminal in uptown Manhattan, but does not have video of him leaving.

NYPD Chief of Detectives Joseph Kenney added that the NYPD has video of the suspect entering a Port Authority bus terminal in uptown Manhattan, but does not have video of him leaving.

Kenney added that the NYPD does not yet know which bus. Maria Aspin, NPR News, New York.

Kenney added that the NYPD does not yet know which bus. Maria Aspin, NPR News, New York.

Shortwave thinks of science as an invisible force showing up in your everyday life. Powering the food you eat, the medicine you use, the tech in your pocket. Science is approachable because it's already part of your life. Come explore these connections on the Shortwave podcast from NPR.

Shortwave thinks of science as an invisible force showing up in your everyday life. Powering the food you eat, the medicine you use, the tech in your pocket. Science is approachable because it's already part of your life. Come explore these connections on the Shortwave podcast from NPR.

Shortwave thinks of science as an invisible force showing up in your everyday life. Powering the food you eat, the medicine you use, the tech in your pocket. Science is approachable because it's already part of your life. Come explore these connections on the Shortwave podcast from NPR.

Brian Thompson was fatally shot outside the Manhattan Hotel where UnitedHealth Group was set to hold its annual investor meeting. Thompson ran an important arm of that company. His UnitedHealthcare unit is the largest U.S. health insurer, providing benefits to tens of millions of people and making close to $300 billion in revenue last year.

Brian Thompson was fatally shot outside the Manhattan Hotel where UnitedHealth Group was set to hold its annual investor meeting. Thompson ran an important arm of that company. His UnitedHealthcare unit is the largest U.S. health insurer, providing benefits to tens of millions of people and making close to $300 billion in revenue last year.

But that's just one part of this huge and influential company. UnitedHealth may not be a household name, but it's the fourth largest U.S. company by revenues, and it touches almost every part of the U.S. healthcare experience. It's even the country's largest employer of doctors. UnitedHealth said last year that it employs or is affiliated with 10 percent of all doctors in the U.S.

But that's just one part of this huge and influential company. UnitedHealth may not be a household name, but it's the fourth largest U.S. company by revenues, and it touches almost every part of the U.S. healthcare experience. It's even the country's largest employer of doctors. UnitedHealth said last year that it employs or is affiliated with 10 percent of all doctors in the U.S.

Maria Aspin, NPR News, New York.

Maria Aspin, NPR News, New York.

Participants wore physical activity trackers for almost 24 hours a day for seven days during a two-year period. Hospital and death records were used to track major cardiovascular events, including heart attack, stroke, and heart failure, for the nine years following the start of the study.

Participants wore physical activity trackers for almost 24 hours a day for seven days during a two-year period. Hospital and death records were used to track major cardiovascular events, including heart attack, stroke, and heart failure, for the nine years following the start of the study.

The researchers found that middle-aged women, who averaged just three and a half minutes of vigorous activity each day, such as climbing stairs or briefly power walking, were 51% less likely to have a heart attack and 31%. 67% less likely to develop heart failure compared with women who did not do similar tiny bouts of vigorous activity. Maria Godoy, NPR News.

The researchers found that middle-aged women, who averaged just three and a half minutes of vigorous activity each day, such as climbing stairs or briefly power walking, were 51% less likely to have a heart attack and 31%. 67% less likely to develop heart failure compared with women who did not do similar tiny bouts of vigorous activity. Maria Godoy, NPR News.