The first duty of every Starfleet officer is to the truth, whether it's scientific truth or historical truth or personal truth! It is the guiding principle on which Starfleet is based! If you can't find it within yourself to stand up and tell the truth about what happened, you don't deserve to wear that uniform!
The president has listened to some people, the so-called Vulcans in the White House, the ideologues. But you know, unlike the Vulcans of Star Trek who made the decisions based on logic and fact, these guys make it on ideology. These aren't Vulcans. There are Klingons in the White House. But unlike the real Klingons of Star Trek, these Klingons have never fought a battle of their own. Don't let faux Klingons send real Americans to war.
Star Trek was an attempt to say that humanity will reach maturity and wisdom on the day that it begins not just to tolerate, but take a special delight in differences in ideas and differences in life forms.  If we cannot learn to actually enjoy those small differences, to take a positive delight in those small differences between our own kind, here on this planet, then we do not deserve to go out into space and meet the diversity that is almost certainly out there.
Q: The Continuum didn't think you had it in you, Jean-Luc. But I knew you did...We wanted to see if you had the ability to expand your mind and your horizons. And for one brief moment, you did.Picard: When I realized the paradox.Q: Exactly. For that one fraction of a second, you were open to options you had never considered. That is the exploration that awaits you. Not mapping stars and studying nebula, but charting the unknown possibilities of existence.