  U Scorpii is a recurrent nova which has been observed in outburst on 10
occasions, most recently in 2010. We present near-infrared and optical
spectroscopy of the 2010 outburst of U Sco. The reddening of U Sco is found to
be $E(B-V) = 0.14\pm0.12$, consistent with previous determinations, from
simultaneous optical and near-IR observations. The spectra show the evolution
of the line widths and profiles to be consistent with previous outbursts.
Velocities are found to be up to 14000\,kms$^{-1}$ in broad components and up
to 1800\,kms$^{-1}$ in narrow line components, which become visible around day
8 due to changes in the optical depth. From the spectra we derive a helium
abundance of $N$(He)/$N$(H)$ = 0.073\pm0.031$ from the most reliable lines
available; this is lower than most other estimates and indicates that the
secondary is not helium-rich, as previous studies have suggested.
