Like most big productions, videogames increasingly require outside consultants to ensure "realism". Whether it's the look and feel of a gun or the turn and spin of a football player, outside help is needed to get the little details right.
Dice brought on real life tier one operators to ensure
Medal of Honor will be the most realistic special ops warfare videogame yet. They also set them down in front of a video camera and interviewed them. For your enjoyment and education, if your 18 years of age or older, here are parts 1-4 of those interviews.