  In the Kachru-Kallosh-Linde-Trivedi (KKLT) de-Sitter construction one
introduces an anti-D3-brane that breaks the supersymmetry and leads to a
positive cosmological constant. In this paper we investigate the open string
moduli associated with this anti-D3-brane, corresponding to its position on the
3-sphere at the tip of the deformed conifold. We show that in the KKLT
construction these moduli are very light, and we suggest a possible way to give
these moduli a large mass by putting orientifold planes in the KKLT "throat".
