  We analyze the possible configurations of D-branes breaking on other
D-branes. We describe these configurations in the context of a brane-antibrane
effective theory in two ways. First as a tachyon configuration representing a
non-trivial bundle over the sphere surrounding the end of the brane a la
Polchinski, and second in terms of tachyon solitons using homotopy theory.
Surprisingly, in some cases there are topologically stable configurations of
broken branes.
