  AM-1, at ~120 kpc, and Pal 14, at ~70 kpc, are two of the most distant
Galactic globular clusters known. We present Hubble Space Telescope WFPC2
photometry of AM-1 and Pal 14 that reveals unprecedented depth and detail in
the color-magnitude diagrams of these two clusters. Absolute and relative age
measurements confirm that both are younger than the inner halo globular cluster
M 3 by 1.5-2 Gyr, assuming all three clusters have similar compositions. Thus
AM-1 and Pal 14 join Pal 3, Pal 4, and Eridanus (studied by Stetson et al.) as
distant Galactic globular clusters with red horizontal branches and young ages
relative to the inner halo. Within the context of the entire body of research
on the ages of second parameter globular clusters, the observed correlation
between age and horizontal branch morphology suggests that age is the best
candidate for the second parameter. However, this conclusion is tempered by the
lack of precise chemical abundance determinations for a significant fraction of
second parameter globular clusters.
