It is shameful that HuffingtonPost only covered the March against Monsanto in Vancouver, Canada. http://www.huffingtonpost.ca/2013/10/12/march-against-monsanto-vancouver_n_4090310.html.
There was a lot of protest taking place in the United States. For example–
For more coverage: http://rt.com/news/march-against-monsanto-gmo-100/.
Brussels seems to have had the best turnout. I may be wrong.