Leftovers in the nation's biological labs

The latest revelations about infectious organisms — "expired disinfectant, anthrax stored in unsecure freezers and labs, samples stored in Ziploc bags" — prompts this response from Tabitha M. Powledge: "Ziploc bags, huh? Essential equipment for 21st century life to be sure, but how many times have you opened your refrigerator to find leaks from a not-quite-ziplocked bag congealed on shelves or dribbled into your veg bin?" Plus the state of marijuana research.