Here is an interesting comparison of Cortana over the course of the 4 halo games:
PTesh adds his dulcet prepubescent tones over the top of one of the new trailers for weapons...
Try upgrading your browser to Google chrome (you wont regret it). There is probably an IE...
Weird Assault Rifle
On the level Keyes, when you start, a little forward and to the left there is an assault rifle standing up (side with handle and trigger on the underside). There is no ammo in it and you cant pick it up if you drop your assault rifle and come back to it. you cant move it with a grenade, shotgun, ect.