Max had done the calculations, and Cabrillo trusted no man more than Hanley, but as he lifted out of the truck’s cargo bed he knew he could be dead in thirty seconds. That’s all the time he had to soar four hundred twenty feet into the air and land precisely on the flat-roofed elevator housing. If he didn’t make it, he’d be just shy of terminal velocity when he augered into the pavement.

Cabrillo came out of the truck with the majestic slow rise of a Saturn rocket, the weight of thrust tightening the straps between his legs and across his back. He wasn’t going to bother with a helmet, but Max convinced him to wear it after mounting a camera so the Oregon could watch his progress as he climbed higher and higher. The world shrank beneath his feet, and he could tell that his launch had gone unnoticed as they’d planned.

There was nothing to be done about people in surrounding buildings seeing him. He could only hope they saw it as some sort of publicity stunt. Ten seconds into the flight, the top of the building looked no closer in the helmet’s monocular display, and he’d burned half his fuel.

But as the hydrogen peroxide jetted through the exhaust nozzles, the weight dropped and his speed increased. His acceleration was geometric, and quite quickly his target appeared to be within reach. The countdown display calculating thrust time showed he had eight seconds of fuel, and he had only a dozen floors to go. More and more of the city opened to him the higher he rose along the skyscraper’s sheer glass wall, but he took no heed. He concentrated on keeping his body still and his movement to a minimum. That was the secret of flying the turbo-vacuum, as Max called it. Stay nice and steady and keep corrective gestures small. He wavered only slightly as he shot higher and higher and knew that if he survived this, it would be an exhilaration he would never forget.

Four seconds left and he passed the thirty-ninth floor. He eased ever so slightly off the throttle control, slowing his assent. He didn’t want to fly higher than absolutely necessary.

He cleared the last floor with a second of fuel remaining, then realized he still had to get above the glass wall that encircled the top of the building. He didn’t remember if Max had included this final barrier in his calculations.