March against Monsanto: World rallies in protest Live updates

Demonstrators participate in a protest march against Monsanto, the world's largest seed company, in Buenos Aires, Argentina, May 23, 2015. (Reuters / Enrique Marcarian )
The third annual ‘March against Monsanto’ protest is taking place in cities around the world. Activists are highlighting the monopoly the GMO giant has in controlling food supply. Protesters say Monsanto controls 90 percent of the seed market in the US.