If They are using this to "prepare" Us, and this is an approved script, then the logical conclusion is that we're being prepared for a "war of the worlds," not alien assimilation. Glen seems to be saying that he and his comrades were attempting to protect against panic by withholding the information. Therefore, they now want to share it in order to garner the cooperation necessary to mount some kind of war. They have already managed to inspire fear through various means.

: Verbatim Transcript of Senator John Glenn on
: "Fraser" Tuesday, March 6, 2001: "Back in
: those glory days, I was very uncomfortable when they asked
: us to say things we didn't want to say and deny other
: things. Some people asked, you know, were you alone out
: there? We never gave the real answer, and yet we see things
: out there, strange things, but we know what we saw out
: there. And we couldn't really say anything. The bosses were
: really afraid of this, they were afraid of the War of the

: Worlds type stuff, and about panic in the streets. So, we
: had to keep quiet. And now we only see these things in our
: nightmares or maybe in the movies, and some of them are
: pretty close to being the truth."