  The origin of the breakdown scale in an effective field theory treatment of
nuclear forces is investigated. Different organizational schemes used in the
nonperturbative calculation of nucleon-nucleon scattering seem to break down
for different physical reasons. It is argued that the same physics is actually
responsible, namely strong two-pion exchange as also observed in the pion
scalar form factor. The prospect of extending the applicability of the
effective field theory beyond this breakdown point is discussed.
