  $^{2}\mathrm{H}(e,e'p)n$ cross sections have been measured at 4-momentum
transfers of $Q^{2} = 4.5 \pm 0.5$ (GeV/c)$^{2}$ over a range of neutron recoil
momenta, $p_{\mathrm{r}}$, reaching up to $\sim1.0$ GeV/c. The data were
obtained at fixed neutron recoil angles $\theta_{nq} = 35^\circ$, $45^\circ$
and $75^{\circ}$ with respect to the 3-momentum transfer $\vec q$. The new data
agree well with previous data which reached $p_{\mathrm{r}}\sim500$ MeV/c. At
$\theta_{nq} = 35^\circ$ and $45^\circ$, final state interactions (FSI), meson
exchange currents (MEC) and isobar currents (IC) are suppressed and the plane
wave impulse approximation (PWIA) provides the dominant cross section
contribution. The new data are compared to recent theoretical calculations,
where we observe a significant discrepancy for missing momenta
$p_{\mathrm{r}}>700$ MeV/c.
