The snippet from the Black Library website:
They lied to us about the Mannheim Gap. They sent us there to die.
You know of whom I speak. We cannot outrun the echoes of Khattar. We pay the price now for our
virtue in the past.
The Celestial Lions will never leave this world. A handful of us remain, but we know the truth. We
died at the Mannheim Gap. We died the day the sun rose over the scrap-iron bodies of alien gods.++
++Message for Black Templars Reclusiarch Merek Grimaldus,
From Celestial Lions Deathspeaker Julkhara++
I've also finished putting the thunderhawk together. Although I suspect I should have taken a bit more care while doing so...but it looks so pretty :)