\subsection*{Recommendations}
The physics program we have explored for a neutrino factory is highly 
promising.  We recommend a sustained effort to study both the physics 
opportunities and the machine realities.
\begin{description}
\item{(i)} We encourage support for the R\&D needed 
to learn whether a neutrino factory can be a real option in the next
decade. 
\item{(ii)} We propose further studies of 
 detectors technologies optimized for a neutrino factory, including
both novel low mass detectors
for near experiments and very high mass detectors for long baselines.
For long baseline experiments  detectors should have
 masses of a few times 10~kt or more that are able to detect and 
measure wrong--sign muons, and detectors of a few kt or more able to 
observe tau--lepton appearance with high efficiency.  It is also 
desirable to identify electrons, and if possible measure the 
sign of their charge. 
Both the detector technologies
themselves and the civil engineering issues 
associated with the construction of such massive
detectors need to be addressed.

\item{(iii)} We recommend continued studies to better compare 
the physics potential of upgraded conventional neutrino beams with 
the corresponding potential at a neutrino factory, and also 
studies to better understand the benefits of muon polarization.

\item{(iv)} The present study concentrated on the muon storage ring as a
 neutrino source and did not cover the additional physics  programs
 which would use the proton driver and the high intensity muon beams. 
We recommend a further study directed at these other facets of physics at a muon 
storage ring facility would be very useful.
\end{description}