I'm having problems finding this token. I cannot find a breakable wall. The only one I've seen is down a hall, and there is no coin in the room.
Military Base, Act
When you get to the part where Ben says "Hey Big Brain, there's a computer" you're going to use the computer and backtrack out into the room with the circle desk in the middle. Go all the way across the room and inside this newly opened door is a breakable wall. It's behind there.