Monsanto blocks independent GMO research in the U.S. –L.A. Times op-ed

Doug Gurian-Sherman writes No seeds, no independent research:
Multibillion-dollar agricultural corporations, including Monsanto and Syngenta, have restricted independent research on their genetically engineered crops. They have often refused to provide independent scientists with seeds, or they’ve set restrictive conditions that severely limit research options.
In case you wondered why all the research seems to come from other countries, such as Argentina and France, as shown in this documentary from Germany? Well, now you know.