@cbsmornings: The lab in Irkutsk where a Russian worker died has long been suspected of involvement in bioweapons research, according to author Annie Jacobsen, whose recent nonfiction book, "Biological War: A Scenario," imagines a lab accident in Siberia unleashing a deadly pneumonic plague. Jacobsen says an accidental release of a dangerous pathogen in Russia is a top concern among experts she consulted: "The number one worry is Russia."