Law Enforcement from around the area and on a national scale are betting in the Fox Valley area this week to participate in the Dark Sky event. Dark Sky is a three day exercise meant to simulate a long-term power outage caused by physical or a cyber attack that affects more than two-thirds of the state. The power will not actually be going out but emergency responders are trying to find the cracks in the system should a crisis hit and fix them. The testing will end in a couple of days.