Gravity. Part 17

At least, every failure they could predict. What Carpenter dreaded was the glitch that no one had thought about. And now he asked himself the same question he always did at the beginning of a new mission phase, What have we failed to antic.i.p.ate?

"ODS has successfully disengaged," he heard Kittredge announce. "Latches have released. We're now in free drift." The flight controller beside Carpenter gave a little punch of triumph in the air.

Carpenter thought ahead, to the landing. The weather at White Sands was holding steady, head winds at fifteen knots. The TACAN would be up and operational in time for the shuttle's arrival.

Ground crews were at this moment converging on the runway.

There were no new glitches in sight, yet he knew one had to be waiting just around the corner.

All this was going through his mind, but not a flicker of expression crossed his face. Not a hint to any of the flight personnel in the room that he was feeling dread, as sour as bile, in his throat.

Aboard ISS, Emma and her crewmates also watched and waited.

All research activities were at a temporary standstill. They had gathered at the Node 1 cupola to look at the ma.s.sive shuttle as it undocked. Griggs was also monitoring the operation on an IBM Thinkpad, which showed the same RPOP wireframe display that Houston's Mission Control was now looking at.

Through the cupola windows, Emma saw Discovery begin to inch away, and she gave a sigh of relief. The orbiter was now in drift, and on its way home.

Medical Officer O'Leary floated in a narcotic daze. He'd injected fifty milligrams of Demerol into his own arm, just enough to take the edge off his pain, to allow him to strap in Mercer, and to batten down the cabin for reentry. Even that small dose of narcotic was clouding his mental processes.

He sat strapped in his middeck seat, ready for deorbit. The cabin seemed to drift in and out of focus, as though he were seeing it underwater. The light hurt his eyes, and he closed them.

Moments ago, he thought he'd seen Jill Hewitt float past with the Thinkpad, now she was gone, but he could hear her strained voice over his headset, along with Kittredge's and Capcom's. They had undocked.

Even in his mental fog, he felt a sense of impotence, of shame, that he was strapped into his seat like an invalid while his crewmates up on flight deck were laboring to get them home. Pride made him fight his way back from the comfortable oblivion of sleep, and he surfaced into the hard glare of the middeck lights. He felt for the harness release, and as the straps came free, he floated out of his seat. The middeck began to s.h.i.+ft around him, and he had to close his eyes to stem the sudden tide of nausea. Fight it, he thought.

Mind over matter. I'm the one who always had the iron stomach.

But he could not bring himself to open his eyes, to confront that disorienting drift of the room.

Until he heard the sound. It was a creaking, so close by that he thought it must be Mercer, stirring in his sleep. O'Leary turned toward the sounda"and found that he was not facing Mercer. He was staring at Kenichi Hirai's body bag.

It was bulging. Expanding.

My eyes, he thought. They're playing tricks on me.

He blinked and refocused. The shroud was still swollen, the plastic ballooning out over the corpse's abdomen. Hours ago, they had patched the leak, now the pressure inside must be building up again.

Moving through a dreamlike haze, he floated across to the sleeping pallet. He placed his hand on the bulging body bag.

And jerked away in horror. For in that brief moment of contact, he had felt it swell, retract, and swell again.

The corpse was pulsating.

Sweat beading her upper lip, Jill Hewitt watched through the overhead window as Discovery unlatched from ISS. Slowly the gap widened between them, and she glanced at the data streaming across her computer screen.

One foot separation. Two feet. Going home. Pain suddenly arced through her head, its stab so unbearable she felt herself beginning to black out. She fought back, holding on to consciousness with the stubbornness of a bulldog.

"ODS is clear," she said through clenched teeth.

Kittredge responded with, "Switching to RCS OP, low Z." Using the reaction-control-system thrusters, Kittredge would now gently steer away from ISS, moving to a point three thousand feet below the station, where their differing orbits would automatically begin to pull them farther apart.

Jill heard the whomp of the thrusters firing and felt the orbiter shudder as Kittredge, at the aft controls, slowly backed them apart.

His hand shook, and his face went tight with the effort to retain control of his grip. He, not the computer, was flying orbiter, and a wayward jerk of the control stick could send them careening off course.

Five feet apart. Ten. They were past the crucial separation phase now, moving further and further away from the station.

Jill began to relax.

And then she heard the shriek on middeck. A cry of horror and disbelief.

She turned, just as a gruesome fountain of human debris burst onto the flight deck and exploded toward her.

Kittredge, nearest the interdeck access, caught the brunt of the force and went flying against the rotational hand controller. Jill tumbled backward, her headset flying off, her body pummeled by foul-smelling fragments of intestine and skin and clumps of black hair, still attached to scalp. Kenichi's hair. She heard the noise of firing thrusters, and the orbiter seemed to lurch around her. A cloud of disintegrated human parts had spread throughout the flight deck, and a nightmarish galaxy swirled, floating bits of plastic shroud and shattered organs and those strange greenish clumps.

A grapelike ma.s.s of them floated by and splattered against a wall.

When droplets collide with, and adhere to, flat surfaces in microgravity, they tremble briefly from the impact, then fall still. The splatter had not stopped moving.

In disbelief, she watched as the quivering intensified, as a ripple disturbed the surface. Only then did she see, embedded within the gelatinous ma.s.s, a core of something black, something moving. It writhe like the larva of a mosquito.

Suddenly a new image caught her eye, even more startling. She stared up through the window above the flight deck and saw the s.p.a.ce station rapidly zooming toward them, so close now she could almost make out the rivets on the solar array truss.

In a burst of panic, she shoved against the wall and dove through that gruesome cloud of exploded flesh, her arms outstretched in desperation toward the orbiter control stick.

"Collision course!" yelled Griggs over s.p.a.ce-to-s.p.a.ce radio.

"Discovery, you are on a collision course!" There was no response.

"Discovery! Reverse course!" Emma watched in horror as disaster hurtled toward them.

Through the s.p.a.ce station's cupola window, she saw the orbiter simultaneously pitch up and roll to starboard. She saw Discovery's delta wing slicing toward them with enough momentum to ram it through the station's aluminum hull. She saw, in the imminent collision, the approach of her own death.

The plumes of firing rockets suddenly spewed out from the forward RCS thruster in the orbiter's nose. Discovery began to pitch downward, reversing momentum. Simultaneously the starboard delta wing rolled upward, but not quickly enough to clear the station's main solar truss.

She felt her heartbeat freeze.

Heard Luther whisper, "Lord Jesus."

"CRV!" Griggs shouted in panic. "Every one to the evac vehicle!

Arms and legs churned in midair, feet flying in every direction as the crew scrambled to evacuate the node. Nicolai and Luther were first through the hatch, into the hab. Emma had just grabbed the hatch handhold when her ears filled with the squeal of rending metal, the groan of aluminum being twisted and deformed by the collision of two ma.s.sive objects.

The s.p.a.ce station shuddered, and in the ensuing quake, she caught a disorienting glimpse of the node walls tilting away, of Griggs's Thinkpad spinning in midair and Diana's terrified face, slick with sweat.

The lights flickered and went out. In the darkness, a red warning light flashed on and off, on and off.

A siren shrieked.

Shuttle flight director Randy Carpenter was watching death on the front screen.

At the instant of the orbiter's impact, he felt the blow as surely as if a fist had been rammed into his own sternum, and he actually lifted his hand and pressed it to his chest.

For a few seconds, the Flight Control Room went absolutely silent.

Stunned faces stared at the front wall. On the center was the world map with the shuttle trajectory trace. To the right the frozen RPOP display, Discovery and ISS represented by wireframe diagrams. The orbiter was now melded like a crumpled toy the silhouette of ISS. Carpenter felt his lungs suddenly expand, realized that, in his horror, he had forgotten to breathe.

The FCR erupted in chaos.

"Flight, we have no voice downlink," he heard Capcom say.

"Discovery is not responding."

"Flight, we're still getting data stream from TCSa""

"Flight, no drop in orbiter cabin pressure. No indication of oxygen leaka""

"What about ISS?" Carpenter snapped. "Do we have downlink from them?" SVO's trying to hail them. The station pressure is droppinga""

"How low?"

"It's down to seven hundred ten a six hundred ninety. s.h.i.+t, they're decompressing fast!"

Breach in the station's hull! thought Carpenter.

But that wasn't his problem to fix, it belonged to Special Vehicle Operations, the hall.

The propulsion systems engineer suddenly broke into the comm loop.

"Flight, I'm reading RCS ignition, F2U, F3U, and F1U. Someone's working the orbiter controls." Carpenter's head snapped to attention. The RPOP display was still locked and frozen, with no new images appearing. But Propulsion's report told him that Discovery's steering rockets had fired. It had to be more than just a random discharge, the crew trying to move the orbiter away from ISS. But until they had radio downlink, they could not confirm the orbiter crew's status. They could not confirm they were alive.

It was the most terrible scenario of all, the one he feared most.

A dead crew on an orbiting shuttle. Though Houston could control most of the orbiter's maneuvers by ground command, they could not bring it home without crew help. A functioning human being was necessary to flip the arming switches for the OMS deorbit burn.

It took a human hand to deploy the air-data probes and to lower the landing gear for touchdown. Without someone at the controls to perform these functions, Discovery would remain in orbit, a ghost s.h.i.+p circling silently around the earth until its...o...b..t decayed from now, and it fell to earth in a streak of fire. It was this that pa.s.sed through Carpenter's head as the seconds ticked by, as panic slowly gathered force around him in the FCR. He could not afford to think about the s.p.a.ce station, whose crew even now might be in the agonal throes of a decompressive death. His focus had to remain on Discovery. On his crew, whose survival seemed less and less likely with every second of silence that pa.s.sed.

Then, suddenly, they heard the voice. Faint, halting.

"Control, this is Discovery. Houston. Houstona"

"It's Hewitt!" said Capcom. "Go ahead, Discovery!"

" a major anomaly a could not avoid collision. damage to orbiter appears minimala"

"Discovery, we need visual on ISS."

"Can't deploy Ku antennaa"closed circuit gonea""

"Do you know the extent of their damage?"

"Impact tore off their solar truss. I think we punched a hole in their hulla" Carpenter felt sick. They still had heard no word from the ISS crew. No confirmation they had survived.

"What is your crew's status?" asked Capcom.

"Kittredge is barely responding. Hit his head on the aft control panel. And the crew on middecka"I don't know about thema""

"What's your status, Hewitt?"

"Trying to a oh, G.o.d, my heada" There was a soft sob.

Then she said, "It's alive."

"Did not copy."

"The stuff floating arounda"the spill from the body bag. It's moving all around me. It's inside me. I can see it moving under my skin, and it's alive." A chill crawled all the way up Carpenter's spine.

Hallucinations.

A head injury. They were losing her, losing their only hope of getting the orbiter down intact.

"Flight, we're approaching burn target," warned FDO. "We can't afford to miss it."

"Tell her to go for deorbit," Carpenter ordered.

"Discovery," said Capcom. "Go to APU prestart." There was no response.

"Discovery?" repeated Capcom. "You're going to miss your burn target!" As the seconds stretched to minutes, Carpenter's muscles tensed, and his nerves felt like live wires. He gave a sigh of when Hewitt finally responded.

"Middeck crew's in landing position. They're both unconscious. I've strapped them in. But I can't get Kittredge into his LESa""

"Screw his reentry suit!" said Carpenter. "Let's not miss that target. Just get the bird down!"

"Discovery, we advise you proceed directly to APU prestart. Just strap him into the starboard seat, and you get on with deorbit." They heard a ragged sigh of pain. Then Hewitt said, "My heada"having trouble focusinga"

"We roger that, Hewitt." Capcom's voice became gentler.

Almost soothing. "Look, Jill. We know you're the one in the commander's seat now. We know you're hurting. But we can guide in on autoland, all the way to wheel stop. If you just stay with us."

She let out a tortured sob. "APU prestart complete," she whispered. "Loading OPS 3-0-2. Tell me when, Houston."

"Go for deorbit burn," said Carpenter.

Capcom relayed the decision. "Go for deorbit burn, Discovery." And he added softly, "Now, let's get you home."

In the h.e.l.lish darkness, Emma braced herself for the shock of decompression. She knew exactly what to expect. How she would die. There would be the roar of air rus.h.i.+ng out of the hull. The sudden popping of her eardrums. The rapid crescendo of pain as her lungs expanded and her alveoli exploded. As the air pressure drops toward vacuum, the boiling temperature of liquid also drops, it becomes the same as the freezing temperature. One instant, the blood is boiling. In the next, it freezes solid in the veins.

The red warning lights, the siren, confirmed her worst fears. It was a Cla.s.s 1 emergency. They had a breached hull, and their air was leaking into s.p.a.ce.