Oh, yeah i forgot to metion that. Shinn really was pissed off because he couldnt overpower Freedom, now we know Destiny isnt Nuclear powered. It looks too, like DRAGOON really cant work in Earth's Atmosphera, such a shame.
No... Destiny IS nuclear powered... either A.) The directors screwed up or B.) It has something to do with the whole Duetrion factor.

DESTINY MOS -
G - Gunnery
U - United
N - Nuclear
D - Duetrion
A - Advanced
M - Maneuver