Free Range Grain was a live, performative action that used basic molecular biology techniques to test for genetically modified (GM) food in the global food trade. CAE wanted this interventionist performance to demonstrate how the "smooth space" of global trade enables the very "contaminations" the authorities say it guards against. CAE/da Costa/Shyu constructed a portable, public lab to test foods for common genetic modifications. Members of the public brought us foods that they found suspect for whatever reason, and we tested them over a 72-hour period to see if their suspicions were justified.