  Within the tachyon condensation approach, we find that a D(p-2)-brane is
stable inside Dp-branes when the bulk is compactified. It is a codimension-2
soliton of the Dp-brane action with coupling to the bulk (p-1)-form RR field.
We discuss the properties of such solitons. They may appear as detectable
cosmic strings in our universe.
