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...
Level: Tayari Plaza
There are a couple of these in the game but the easiest of find is on Tayari Plaza. Make your way through the game until you find a flight of stairs where there are some Elite and Brute bodies at the top. If you can hear Buck saying "What happened here?", you are in the right place. The Superintendent should reply with "Final notice, bill passed due". Continue upwards to a balcony with a dead Brute and Elite. To the right of the Elite you will see the card. The cards seem to show a number of never before seen Covie weapons.