"He's probably monitoring Lone Star's tac frequency." Handing Zig his AK, I rummaged around in the piles of trash and debris and found a short length of wiring pipe. Picking my way to the back wall, I smacked the pipe against the cinderblocks twice, waited, then hit it twice more. Even without a signal. Stealth moved away from Zig and Zag, then brought up his own Kalashnikov.