See:
http://www.delawareonline.com/apps/pbcs.dll/article?AID=/20050710/OPINION09/507100301/1110/OPINION
Quotes:
"Experience suggests that the government errs on the side of caution. In
1951, the Invention Secrecy Act gave the government authority to suppress
any design it deemed detrimental to national defense. Certain areas of
research -- atomic energy and cryptography -- consistently fell within its
purview.
But the government also placed secrecy orders on aspects of cold fusion,
space technology, radar missile systems, citizens band radio voice
scramblers, optical engineering and vacuum technology.
Such caution, in the microbiology realm, may yield devastating results. It
is not in the national interest to stunt research into biological threats.
. . ."
- Jed