EcoWatch: Evidence has been mounting that the U.S. Department of Agriculture (USDA) has been silencing its own bee scientists who have raised the alarm about the deadly impact that pesticides, particularly neonicotinoids, have on bees. Last month, for example, the Washington Post reported the story of Jonathan Lindgren, a USDA bee scientist, who filed a whistleblower suit alleging that he was disciplined to suppress his research. In 2014, Dr. Jeffery Pettis, another USDA bee scientist and beekeeping advocate,...