Officials have completed environmental anthrax tests at a St. Paul mail facility. Lab results are expected back within a week. The mail recovery center is one of three in the nation that handles undeliverable mail. It takes in millions of letters and parcels, some of them from the East Coast, where anthrax has been found in mail-sorting machines. Michael Osterholm is director of the University of Minnesota's Center for Infectious Disease Research and Policy. He spoke on MPR's Midday program today, where he told Gary Eichten the company hired to do the testing knows very little about anthrax. He says the St. Paul postal workers should feel safe anyway, because a few anthrax spores that might be lying around do not pose a significant threat.