His movements had stirred up clouds of dust that obscured the light from his flash. It took real effort to see the other end of the tunnel seven more meters along. A plascrete plug blocked it. He cursed silently for just a moment, then activated the Crypto Circuit link. "Duran, I’m going to need a drain opener. We’ve got a blockage up here." Skater played the flash over the rough plascrete surface, trying to estimate its depth.