At the beginning of Mission 7, before or after you kill the two brothers, there are four lockers on the right wall of the side of the bridge that you start at. If you are looking directly across the bridge and turn 90 degrees, you will see four lockers on the wall. In one of them is a pair of X-ray goggles. If you look around in the wooden crates on the side that you started on, there should be a new weapon called the Hawk. It is a disk that you can throw and slice people with.