For starters, it's unlikely that only the US government and no other scientists from around the globe know about ETI.  Just thought I'd point that out.

If you are interested in the topic of the likelihood of ETI, I recommend a book I read recently, The Eerie Silence by Paul Davies.
http://www.amazon.com/Eerie -Silence-Renewing-Search-In telligence/dp/0547133243/re f=sr_1_1?s=books&ie=UTF 8&qid=1278688671&sr =1-1

by reba on 07/09/2010 11:23:20 AM EST