The walkout at the JBS plant in Greeley, Colo., comes as beef prices have soared, cattle supplies have plunged and immigration sweeps have stressed the labor supply.

Farmworkers in Texas took cues from strikes Chavez helped lead in California to demand better pay and more rights.

© Ted Streshinsky/Corbis, via Getty Images

Public schools are expected to reopen on Wednesday for 50,000 students in the city. Teachers demanded higher wages and health care benefits.

© Carlos Barria/Reuters

The strike closed public schools for more than 50,000 students in the city and had no end date. Health care costs are a key issue in negotiations.

© Stephen Lam/Reuters

Thousands of protesters shut down streets throughout Minneapolis-St. Paul to demand that federal immigration agents end their weekslong crackdown. Businesses closed in solidarity.

© David Guttenfelder/The New York Times

Now, vacationers looking to ski are wondering what to do and merchants are hoping it doesn’t last.

© William Woody for The New York Times