.... begin to see how complex and difficult football really is. First, you have your "keys", the people on the opposing team who, through their actions, tell you where you should go. You have to read their movements and determine where you should go in only a split second and hopefully you read your key correctly and you get to make the tackle. If all goes well you get the satisfaction of a job well done and you move onto the next play. The object, for the defensive unit, is to find a way to stop the opposing team from moving the ball ten yards. The offense has four chances to try to advance the ball this distance. If the defense accomplishes their goal, then the offensive ....