I don't know. To me,
this seems strange. In Germany,
it's against the law
to publish a book
that looks at the Holocaust
from unorthodox
perspectives. If some
US publisher creates
such a book and then
sells a press run to
some German fringe group who might
re-sell the copies
in Germany, then
should the FBI arrest
the publishers here
for "conspiring"
to break the law over there?
It's convoluted
as an example,
but these law-intensive days,
it seems once you set
a precedent, hell
breaks out right away, and laws
that seemed good and clear
end up getting used
to do all sorts of odd stuff
in other contexts.
No, you can't be arrested for conspiring to commit an act that isn't illegal in the US. The FBI wouldn't arrest a group of Christians for "conspiring" to preach Christianity in Saudi Arabia.