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...
Fly a Pelican and a Phantom
Level: New Alexandria
If you do this correctly you are able to pilot a pelican and a phantom. Play through the level with a buddy. When you get to the hospital make sure one of you picks up a jet pack, it's used later on. Near the end where Kat asks you to come to the Oni base to help her out, fly to Club Errera (the building with the red strip around it, refer to the images below). Circle the building until you find a small alcove. You will see a glowing switch on the roof of the alcove. You need to have the person with the jet pack, reach that switch and flip it. Now all you need to do is fly through the ring shaped building (see the last image), and you are transformed into a pelican. If you want to fly the covie drop ship, just fly through the ring with a banshee.