Some 650 delegates from 33 countries and 120 organizations have started arriving in Cuba as part of a solidarity caravan transporting some 20 tons of humanitarian aid as the island grapples with a severe energy crisis.

The Amazon Labor Union, a grassroots labor group that won a major victory at an Amazon warehouse two years ago, has agreed to affiliate with the Teamsters union.

The first labor union for Amazon workers in the United States is divided, running out of money and still does not have a contract two years after clinching a historic victory in New York City.

Amazon workers in upstate New York overwhelmingly rejected a union bid on Tuesday, handing a second defeat to the labor group that’s been attempting to drag the company to the negotiating table since its historic win earlier this year.

A stunning upset in a union election on Staten Island had brought sudden exposure to the organizers and worker advocates who realized victory for the nascent Amazon Labor Union when so many other more established labor groups had failed before them.

Amazon workers in Staten Island, New York, voted to unionize on Friday, marking the first successful U.S. organizing effort in the retail giant’s history.

The National Labor Relations Board says there's sufficient interest to form a union at an Amazon distribution center in New York City.