Ben jerked hard on the line, then dropped it and dove with the others into the lake. They filled their lungs with air, then ducked below the surface. Nothing happened. Ryan poked his head out and swore. He sloshed out of the lake onto the beach, picked up the loose end of the line and gave it a tug. It tugged back as if caught on a branch.

“I'll check. Must be hung up on something,” he called out to the others, and followed the line inland.

Ryan was only partly right. The line was snagged on someone, not something. A stray guard had seen Diego bolt for the lake and had gone over to investigate. He was holding the line in his hand when he saw Ryan approach from the beach. Ryan was bent low, his eyes following the line, and he never saw the man level his gun. The first sign that he was not alone was the impact of the bullet hitting him in the shoulder like a fiery hammer blow. He dropped to his knees.

The guard never got off another shot. Diego, who had been fol- lowing Ryan's trail, let off a burst that stitched its way across the guard's chest. The guard was thrown back by the impact, but his fingers clutched the line in a death grip. Ryan watched through filmy eyes as the guard fell, his weight pulling on the line. An alarm sounded in his brain, cutting through the pain and confusion, and he tried to rise, but his legs were made of rubber. Then he felt strong hands lifting him to his feet and guiding him back toward the lake. They were almost at the water's edge, when the lake lit up as if it had been sprayed with phosphorescent paint.

When the guard had toppled over, the tug had been transmitted along the line to the grenade rings. They'd popped out, and the levers had gone flying, igniting the fuse train. Six seconds later, the grenades went off simultaneously. A millisecond after that, the hydrogen in the tank ignited. The fiery gas rushed along the short length of the pipe and exited through the nozzle as if it were expelled from the busi- ness end of a flamethrower. The spurting flames touched off the in- visible cloud of hydrogen hanging under the dome.

The airship hangar became a hell for the Kiolyan guards. Satu- rated with hydrogen, the superheated air exploded inside the dome, instantly incinerating flesh and bone. The dome contained the heat for only a few seconds, glowing white hot, before the thick plastic cells that formed the walls evaporated. But the delay before the final explosion of flames gave Ryan and Diego the time they needed. They gained the water's edge and dove into the lake as the dome exploded and sent out sheets of flame that vaporized the surrounding forest and outbuildings. Blistering waves of heat rippled out in every di- rection.