Over the last decade, journalists and animal protection advocates have conducted more than eighty undercover investigations at factory farms and slaughterhouses in the United States. Without exception, each investigation has exposed horrific animal suffering, as well as violations of laws designed to protect food safety, the environment, and workers. These investigations, as well as the subsequent media coverage, have led to food safety recalls, citations for environmental and labor violations, evidence of health code violations, plant closures, criminal convictions, and civil litigation. Such investigations have resulted in thousands of news stories and have made invaluable contributions to national conversations on matters of significant public concern. In response, the animal agriculture industry has pushed for the passage of “Ag-Gag” laws, which criminalize undercover investigations at factory farms and slaughterhouses. Ten states have passed such laws. Matthew Liebman (SLS ’06), Director of Litigation for the Animal Legal Defense Fund, will discuss ALDF’s successful efforts to invalidate Ag-Gag laws through litigation under the First Amendment.