This is probably the most convincing evidence I've ever seen when it come's to extra terrestrials. This essentially made me a believer.
www.disclosureproject.org
They're all former military and civil workers.
And this is where you can see the National Press Conference which happened in Washington DC 2001.
http://www.netro.ca/disclosure/npccmenu.htm
From the website:
"The Disclosure Project is a nonprofit research project working to fully disclose the facts about UFOs, extraterrestrial intelligence, and classified advanced energy and propulsion systems. We have over 400 government, military, and intelligence community witnesses testifying to their direct, personal, first hand experience with UFOs, ETs, ET technology, and the cover-up that keeps this information secret."