  We measured the $12.8\mu$m [NeII] line in the dwarf starburst galaxy He 2-10
with the high-resolution spectrometer TeXeS on the NASA IRTF. The data cube has
diffraction-limited spatial resolution $\sim1^{\prime\prime}$ and total
velocity resolution including thermal broadening of $\sim5$km/s. This makes it
possible to compare the kinematics of individual star-forming clumps and
molecular clouds in the three dimensions of space and velocity, and allows us
to determine star formation efficiencies. The kinematics of the ionized gas
confirm that the starburst contains multiple dense clusters. From the $M/R$ of
the clusters and the $\simeq30-40$% star formation efficiencies the clusters
are likely to be bound and long lived, like globulars. Non-gravitational
features in the line profiles show how the ionized gas flows through the
ambient molecular material, as well as a narrow velocity feature which we
identify with the interface of the HII region and a cold dense clump. These
data offer an unprecedented view of the interaction of embedded HII regions
with their environment.
