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GM CEO Mary Barra and Ventec Life Systems CEO Chris Kiple talk with employees at an Indiana electronics plant that has shifted to producing ventilators for the federal government.

General Motors on Tuesday began mass production of critical care ventilators that will be delivered to the federal government to replenish depleted U.S. stockpiles in the fight against the coronavirus.

Why it matters: The automaker has a $489.4 million contract to produce 30,000 ventilators by August under the Defense Production Act, which President Trump invoked on March 27 in an effort to meet exploding demand for the life-saving devices.

Details: GM and its partner, Ventec Life Systems, said they will ship more than 600 ventilators this month, and almost 15,000 by the end of June. All 30,000 will be delivered by the end of August, but GM said it has the capacity to build more ventilators after August if needed.

“Thousands of men and women at GM, Ventec, our suppliers and the Kokomo community have rallied to support their neighbors and the medical professionals on the front lines of this pandemic. Everyone wants to help turn the tide and save lives. It is inspiring and humbling to see the passion and commitment people have put into this work.”
— GM CEO Mary Barra

The big picture: The Trump administration has said it is working with about 10 ventilator companies to obtain about 100,000 of the machines over the next 100 days.

Go deeper

Golfer Bryson DeChambeau will miss Olympics after testing positive for COVID

Bryson DeChambeau of the United States on the 18th tee during Day Two of the 149th Open at Royal St George’s Golf Club on July 16 in Sandwich, England. Photo: Andrew Redington/Getty Images

Golfer Bryson DeChambeau has tested positive for COVID-19 and will miss the Tokyo Olympic Games, USA Golf announced late Saturday.

What's happening: "Patrick Reed will replace DeChambeau and is undergoing the requisite testing protocol" Sunday and Monday before his expected departure for Japan, per a USA Golf statement.

In photos: Scenes from some of the worst fires raging in the U.S.

A home explodes into flames as the Dixie Fire rips through the Indian Falls neighborhood of unincorporated Plumas County, California, on July 24. The blaze started near the origin of the deadly 2018 Camp Fire and has churned burned over 185,000 acres. Photo: Josh Edelson/AFP via Getty Images

Out-of-state crews went to Montana to tackle a wildfire that wounded five firefighters as Australia sent a large air tanker to help Californian firefighting efforts, as 88 large blazes raged in the U.S. Saturday.

The big picture: Montana Gov. Greg Gianforte (R) tweeted his thanks to Utah and California for sending crews over the weekend, as the two states battle their own blazes. The Australian tanker arrived in Calif., this week, where Gov. Gavin Newsom (D) proclaimed a state of emergency for four northern counties Friday.

Updated 4 hours ago - Sports

Swimmer Chase Kalisz first American to win Tokyo Olympics gold medal

Chase Kalisz of Team United States celebrates after winning the Men's 400m Individual Medley Final on day two of the Tokyo 2020 Olympic Games at Tokyo Aquatics Centre in Tokyo, Japan. Photo: Al Bello/Getty Images

Swimmer Chase Kalisz has become the first Team United States Olympian to win gold at the Tokyo Games.

The big picture: The Rio 2016 silver medalist's winning time in the men's 400 meters Individual Medley Final was 4 minutes 9.42 seconds. His teammate Jay Litherland took silver, .86 seconds behind him. Moments later, Kieran Smith grabbed a third medal for the U.S. when he won bronze in the 400-meter freestyle.

Go deeper: Full Axios coverage

Editor's note: This article has been updated with new details throughout.