Greenpeace intercepted a trainload of USA maize as it tried to enter Mexico in response to fresh evidence that the US was dumping Monsanto's genetically engineered crops across the border contradicting international agreements. The banner says " Stop genetically engineered corn" and showing a cob of corn crossed out with the word "genetically modified" in Spanish. A Greenpeace climber is visible next to the left banner. This action precedes the WTO meeting in Cancun next month.