The Pentagon on Friday said it has identified five more potentially live anthrax shipments inadvertently shipped to laboratories, and has instructed labs which received inactive samples to stop working with the materials until further notice. A total of 24 laboratories in 11 states and two foreign countries — Australia and South Korea — are believed to have received suspect samples, the Department of Defense said in a statement. Defense officials tell NBC News the anthrax spores had been irradiated to kill them in 2008.
