Enter the HQ

Enter the HQ is the third story mission during Chapter 4 in Dead Rising 3.

Summary
After Nick finds his way into the compound, he must sneak into the main headquarters. If he's wearing the uniform to disguise himself, he can walk right through the door. If he snuck through the compound, a service door can be entered into the headquarters building. If fighting was the way to go, defeat all of the soldiers to enter the door safely, or, simply run towards the door and enter it.