re: Water on the brain?
Also see post by Phil:
"Congressional Testimony on commercial space access" - phil
Excerpt from link he provided:
"Second is the difficulty of designing and obtaining approval for flight termination systems, an important system on untested, high energy launch vehicles. This is the onboard equipment and explosives that, if needed in a major malfunction, would destroy the launcher and its payload. Today’s low launch rates only sustain a few companies that provide these components. The result is that our flight termination system is one of the most expensive and difficult to integrate elements of our launch vehicle."
http://www.spaceref.com/news/viewsr.html?pid=9833