Photo and video collection from Greenpeace actions at the world headquarters of Walmart. The world's largest retailer buys canned tuna from Thai Union and Greenpeace flew its thermal airship A.E. Bates with the messages "Walmart: Cleanup Needed in Tuna Aisle" and "Save Oceans Protect Workers. The airship flew over the company's world headquarters as it prepares to host shareholders in its annual general meeting. A video billboard truck cruised around the central business district with the Walmart Home Office, Walmart Museum and historic building collection asking people to take action to save the ocean and protect workers in the global tuna trade.