in 2006 in UK up from 51 in 1993. The 2009 H1N1 (swine flu) flu pandemic was also considered a natural disaster. On October 25, 2009, U.S. President Barack Obama officially declared H1N1 a national emergency. Despite President Obama's concern, a Fairleigh Dickinson University PublicMind poll found in October 2009 that an overwhelming majority of New Jerseyans (74%) were not very worried or not at all worried about contracting the H1N1 flu virus. A study conducted in coordination with the University of Michigan Health Service is scheduled for publication in the December 2009 American Journal of Roentgenology warning that H1N1 flu can cause pulmonary embolism, surmised as a leading cause of death in this current pandemic. The study authors suggest physician evaluation via contrast enhanced CT scans for the presence of pulmonary emboli when caring for patients diagnosed with respiratory complications from a "severe" case of the H1N1 flu. As of May 30, 2010, as stated by the World Health Organization, more than 214 countries and overseas territories or communities have reported laboratory confirmed cases of pandemic influenza H1N1 2009, including over 18,138 deaths. Footnote The Walkerton Tragedy is a series of events that accompanied the contamination of the water supply of Walkerton, Ontario, Canada, by Escherichia coli bacteria in May 2000. Starting May 11, 2000, many residents of the community of about 5,000 people began to simultaneously experience bloody diarrhea, gastrointestinal infections and other symptoms of E. coli infection. Seven people died directly from drinking the E. coli contaminated water, who might have been saved if the Walkerton Public Utilities Commission had admitted to contaminated water sooner, and about 2,500 became ill. In 2001 a similar outbreak in North Battleford, Saskatchewan caused by the protozoan Cryptosporidium affected at least 5,800 people. Non-natural disasters Vehicular wrecks On January 31, 2000, Alaska Airlines Flight 261 crashed into the Pacific Ocean off the coast of California after the plane's jackscrew failed, killing all 88 on board. On July 25, 2000, Air France Flight 4590, a Concorde aircraft, crashed into a hotel in Gonesse just after takeoff from Paris, killing all 109 aboard and 4 in the hotel. This was the only Concorde accident in which fatalities occurred. It was the beginning of the end for Concorde as an airliner; the type was retired three years later. On August 12, 2000, the Russian submarine K-141 Kursk sank in the Barents Sea, killing all