Verizon workers protest outside one of the company's facilities in Philadelphia on April 13.
Matt Rourke — AP
By Aaron Pressman
April 13, 2016

About 40,000 Verizon workers up and down the East Coast walked off the job on Wednesday after contract negotiations broke down. The nation’s second-largest telecommunications carrier by revenue wants to be able to transfer employees to another city for up to two months, outsource more work to non-union contractors and close down U.S.-based call centers that could be moved to Mexico or the Philippines.

It’s the second big strike at Verizon (vz) in the past few years—and it ranks as the third-largest in the entire country over the past 10 years according to annual data reported by the Bureau of Labor Statistics and compiled by Fortune.

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Here are the 10 biggest strikes by number of employees involved between 2006 and 2016:

10. Kaiser Permanente Hospitals and Sutter Hospitals in California and Providence Hospital in Washington, D.C. see 19,000 nurses walk out in November 2014.

9. Kaiser Permanente Hospitals faces 21,000 nurse and engineer strike in California in January 2012.

8. AT&T hit by a strike of 21,200 members of the Communications Workers of America in California, Connecticut, and Nevada in August 2012.

7. Tough to hail a cab in New York City in September 2007 as 26,000 cabbies strike.

6. Chicago schools shut down as 26,500 teachers walk off the job in September 2012.

5. Boeing sees 27,000 members of the International Association of Machinists walk out in Washington, Oregon, Kansas, and California in September 2008.

4. Sutter Hospitals, Kaiser Permanente Hospitals, and the Children’s Hospital and Research Center face nurse, engineer, and healthcare worker strikes of 29,000 people in September 2011.

3. An estimated 40,000 workers at Verizon go on strike from Massachusetts to Virginia in April 2016.

2. Verizon hit by 45,000 worker work stoppage of CWA members along the East Coast in August 2011.

1. General Motors and the United Auto Workers lock horns in 2007 and 74,000 workers nationwide walk out.

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