One of the most devastating public health crises in history hit the U.S. on this date 95 years ago — and experts are still studying it, hoping to head off a similar global pandemic. The first cases were reported among soldiers at Fort Riley, Kansas. By October, the worst month, 195,000 Americans perished. By 1920, nearly one-in-four Americans had suffered from this strain of the flu, killing about 575,000. Worldwide, estimates put the death toll between 30 million to 50 million. Even less dramatic forms of the disease are deadly. Producing vaccines involves some 350 establishments in a nearly $22 billion a year business in the U.S. You can find more facts about America from the U.S. Census Bureau, online at <www.census.gov>.