There was no time for a reply, as the first protector thudded towards them. It was almost level with the building entrance, when its legs suddenly stopped moving, causing it to skid to a halt, in a shower of dust and gravel. The second one almost crashed into it, before also coming to a halt.
All their movements ceased for a few moments, then, very slowly, the first protector raised its large head as if listening. Abruptly it turned and faced the group at the top of the steps. Peering around the scientist, and alarmed at what he saw, Mike shouldered his rifle then grabbed hold of the nearest door handle, ready to open it and escape back inside. Terry reached for the other handle, trying not to panic. For a few long minutes, nothing more happened until the first protector began to mount th
