As the walls of the tunnel reverberated with the sounds of the charging plasma mortar John dashed over to the rent in the tunnel wall—firing three more bursts from his battle rifle back at the advancing enemies as he went—then turned and disappeared into the breach. He had made it no more than thirteen meters when the mortar round slammed into the opening, sending a wall of concussion and heat that drove him to his knees and caused his shields to overload and drop. John got back to his feet, but Private Jemison, the second-to-last man to make it into the breach, was lying facedown in the now boiling muck—his organs ruptured and bones splintered from that same blast. Howls from the darkness told him that Jemison wasn’t the only casualty. He ran past Private First-Class Locke, whose split and blistered flesh and raw bone were visible through smoldering holes in his BDUs. He stepped over Private First-Class Galliard, who had been felled by a piece of rebar that entered just below the nape of his neck and exited through the bridge of his nose—the still-glowing chunk of steel protruded from the sewer wall ten yards farther ahead.