Title:

Megamasers, Hubble Constant and Dark Energy



Fred Lo
NRAO



Abstract:

A new key project, the Megamaser Cosmology Project, will be described.
The nature of water megamasers, the importance of determining Hubble
Constant to high precision and its relevance to Dark Energy will be
explained.  The current and future status of the NRAO will also be
presented.