The Germ Front:  See Sidebar: "Undermining International
Bioweapons Controls"  With one Florida man dead of anthrax and
another exposed, frightened Americans want to know if something
even worse than the horrific events of September 11 now lies
ahead of us. Could terrorists loose bioweapons of mass
destruction upon us: anthrax and smallpox, botulism and plague,
invisibly airborne? The answer -- which is perhaps more
frightening still -- is that the experts can't say.  This past
spring, researching bioterrorism for a book about emerging
infections, I spoke to Jonathan Tucker, director of the Chemical
and Biological Weapons Nonproliferation Program at the Monterey
Institute of International Studies in Washington, D.C. Tucker, a
thoughtful man who has written recent books about toxic weapons
and about the resurging threat of smallpox, told me then that
while low-tech terrorist strikes such as food poisonings were
always possible, a major bioattack wasn't plausible. In order to
inflict large numbers of deaths, Tu