While the swim might seem likely to get cut, Korff cited a 2011 fire at a sewage-treatment plant that led to millions of gallons of waste flowing into the Hudson.
Other times the attacks are more personal:In 2000 a discontented consultant, rejected for a job at a water treatmentplant in Australia, remotely hacked into a sewagetreatment system and released 264, 000 gallons of raw sewage into rivers and parks.