WASHINGTON, June 7 -- Sen. Charles E. Grassley, R-Iowa, issued the following news release: Q: How is the federal government responding to recent outbreaks of avian flu? A: As Iowa's senior U.S. Senator, I'm staying on top of federal agencies with prevention, control, emergency management and public health responsibilities to effectively serve the American people. That includes upholding confidence in the food supply to supporting farm workers and livestock producers. Highly pathogenic avian in more PR