"The viruses are grown in a preparation of the very bacteria they kill, and then purified. The FDA had concerns that the virus preparation potentially could contain toxic residues associated with the bacteria. However, testing did not reveal the presence of such residues, which in small quantities likely wouldn't cause health problems anyway, the FDA said."

The use of 'likely' there really gets me if ya know what I mean. "It's likely that if everything goes according to plan the nuclear device won't detonate." Yeah, right, pass it over here will ya?