Flag, wow, just wow. Its a few years old at this point but its oh so pertinent to our modern wars and political affairs.
I just watched episode 13 and am still broken up about it. Won't spoil it, but 13 is hard, very hard. Wolf's Rain for everyone who has has seen it times 2. Good old modern senseless warfare and death.
OTOH my favorite scene is in episode 12 where Shirasu comes into her own and is a proper front line imbedded war photographer. Extremely powerful scene.
http://www.youtube.com/watch?v=zS2hdT-Zd8Y&feature=related