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...
Start on Outskirts on any difficulty. Fight through the part until the Hunters break through the door. Kill them, and then go through. Very quickly run into the next part and ignore the Jackals shooting at you. You should see two blue crates stacked on top of each other. Jump onto them to the higher platform, and you should see two green crates right next to each other. Jump on one of them, turn around to the direction of the Jackals, and then jump onto the light post in front of you. Once on the light post, turn directly around and jump onto the rafters of the building you see.