The following is from http://www.nidcr.nih.gov/news/inside%5Fscoop%5Fcancer%5Frsch.asp
CANCER RESEARCH: KILLING TUMOR CELLS WITH ANTHRAX-BASED IMMUNOTOXIN
As the news broke last fall of anthrax-tainted letters, some reporters
eventually spun the story in a completely different direction. They
highlighted early research studies in which scientists use modified anthrax
proteins to fight human disease. Among the work mentioned prominently has been
studies at NIDCR to produce a recombinant immunotox
