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Botulism bacteria, or Clostridium botulinum, grow in poorly preserved canned foods, especially meat and fish. The microbe's toxin could be lethal as a bioweapon. Dr. Phil Luton/Science Photo Library/Corbis hide caption

toggle caption Dr. Phil Luton/Science Photo Library/Corbis

A minke whale photographed in Antarctica last year. The minke, smallest of the baleen whales, turned out to be the mysterious "bio-duck." Tony Beck/Barcroft Media/Barcroft Media/Landov hide caption

toggle caption Tony Beck/Barcroft Media/Barcroft Media/Landov
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An airborne Apache attack helicopter takes off above a Black Hawk helicopter from the South Carolina Army National Guard base in Eastover, S.C., in 2007. The Army is planning to move all the National Guard's Apache helicopters to the regular Army, a move opposed by many in the Guard. Mary Ann Chastain/AP hide caption

toggle caption Mary Ann Chastain/AP
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