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Photo: Kevin Dietsch/Getty Images

Southwest Airlines canceled more than 350 flights and delayed around 600 others on Monday after mass cancellations over the weekend from what the airline called "operational challenges," according to AP.

Driving the news: The cancellations started after its pilots asked a court to block the company's new COVID vaccine mandate, though Southwest said Sunday the service disruptions were not a result of a planned labor demonstration by its pilots, Axios' Michael Mooney and Ben Montgomery report.

  • The Dallas-based airline canceled about 1,900 flights over the weekend, citing air traffic control issues and bad weather, AP reports.

The big picture: The company said Monday it expects normal service to return this week, according to Reuters.

Go deeper: Southwest Airlines denies that pilot "sick out" drove weekend of delays

Go deeper

Former top Boeing pilot indicted for "scheming to defraud" airline customers

Boeing 737 MAX airplanes are seen parked on Boeing property on Aug. 13, 2019 following two fatal jetliner crashes. Photo by David Ryder via Getty Images

A federal grand jury on Thursday indicted a former top Boeing pilot who is accused of deceiving the Federal Aviation Administration when the company sought the regulator’s approval for its 737 MAX plane.

Why it matters: A malfunction with the jet's flight control software, known as Maneuvering Characteristics Augmentation System (MCAS), had a hand to play in two crashes that killed 346 people.

Nikolas Cruz pleads guilty to Parkland school shooting

Parkland school shooter Nikolas Cruz at the defense table during jury selection at the Broward County Courthouse in Fort Lauderdale, Fla., on Oct. 6, 2021. Photo: Amy Beth Bennett/South Florida Sun Sentinel/Tribune News Service via Getty Images

Nikolas Cruz on Wednesday pleaded guilty on all counts for carrying out the 2018 shooting at the Marjory Stoneman Douglas High School in Parkland, Fla., that left 17 people dead, including 14 students and three staff members.

Driving the news: Cruz, 23, pleaded guilty at a hearing on Wednesday to 17 murder counts and 17 counts of attempted first-degree murder for carrying out the deadly shooting.

2 hours ago - Health

White House unveils plan to "quickly" vaccinate kids ages 5-11

Charles Muro, 13, is inoculated at Hartford Healthcare's mass vaccination center at the Connecticut Convention Center in Hartford, Conn. Photo: Joseph Prezioso/AFP via Getty Images

The White House on Wednesday released its plan to vaccinate children between the ages of five and 11, pending authorization from the Food and Drug Administration of the first COVID-19 shot for that age group.

The big picture: The White House said it has secured enough vaccine supply to equip more than 25,000 pediatric and primary care offices, hundreds of school and community health clinics, as well as tens of thousands of pharmacies, to administer the shots.