He could feel the warmth leaking out of the late afternoon as the sun dropped towards a line of low, scrubby hills in the west. There was a faint but noticeable dry heat radiating from the haze, but that was all.

‘Care to take a closer look, Major?’ he said.

Nuсez shook his head. ‘No. But what else is to be done?’

The Cuban officer took the first steps away from the convoy, towards the new edge of the known world. Musso fell in beside him as they cautiously approached the barrier. The country hereabouts was little different from the area around Guantanamo. Both were nestled at the edge of the Sierra Maestra ranges, the remnants of huge fractured slabs of continental plate, raised from the ocean floor over millions of years by tectonic impact, volcanic eruptions and the 100,000-gigatonne blast of the Chicxulub comet punching into the surface of the planet just a short distance away, some 65 million years ago. The Maestra was perfect guerrilla territory, a vast contrary maze of steep valleys, volcanic dykes, abrupt fault lines and almost impenetrable karst areas, all riven with limestone caves and covered in dense forest. The ranges gave out on the far side of the haze, smoothing out into the low, rolling plains that made up nearly two-thirds of Cuba’s land surface. For all of the earth-shattering violence that had gone into creating this environment over the eons, it was nothing compared to the immediate spectacle of the static energy wave.

Musso was able to make out the lowland steppes on the far side without much trouble. Nothing moved there. He had earlier compared it to looking through a waterfall, but now to his mind it was more like a few layers of plastic wrap. He stooped down to pick up a rock as they walked, wondering what would happen if he threw it in. Nuсez slowed as they approached the face. It appeared to billow, like a sail, just as the Cuban had described. They stopped about fifty yards away.

‘I would not think it safe to get much closer,’ Nuсez warned.

‘I wouldn’t argue with that, Major,’ agreed Musso. ‘Let’s just accept we’re both possessed of stainless-steel cojones and take it nice and careful from here.’

He could see a burnt-out car wreck on the far side, near a bend in the road, and wondered if that’s where Nuсez’s superior officer had disappeared. This close to it, he avoided looking up. The scale of the thing was enough to give him a teetering sense of vertigo without making it any worse by craning his head back. He turned around to check on his people. They were all watching anxiously, their bodies rigid with anticipation.

Suddenly there was a whooshing noise and he saw them all jump, like an audience in a horror movie frightened by a cheap stunt. ‘What the fuck?’ he said, turning to Nuсez.

But the Cuban was gone. Only his smouldering uniform remained.

The cries of his comrades and of Nuсez’s men reached him a moment later. ‘Run, General! Get the hell outta there!’

Admiral Ritchie found his eyes straying from the television news broadcast to the silver-framed picture of his daughter on the desk in front of him. The photograph was old. Nancy was nineteen now, but on his desk, she remained forever three, holding a small bear, sucking her thumb, and staring off a thousand miles into the distance.

He had to tear his eyes away. It was almost too painful to bear. She should be all right – she was supposed to fly out from Chicago for Europe very early this morning. But they had heard nothing from her. Had she made the flight? Had it escaped the Wave? He didn’t know. His wife Amanda was frantically trying to find out, but without much luck. With a grinding effort of will, Ritchie turned his attention back to work.

Thank God for cable news at least, he thought. He had wondered if he might have to press the Governor’s office for a declaration of martial law, fearing that violence would be inevitable as the population of the islands digested what was happening. But far from sending mobs onto the street, the wall-to-wall media coverage, all of it sourced from Asia and Europe, seemed to be keeping Hawaii’s civilian population glued to their TV and computer screens. Every available police officer had been called in, and a battalion apiece of Marines and the army were hurriedly kitting out with crowd-control gear, just in case, although all of the reports he’d received so far had the streets half deserted. Hopefully they wouldn’t be needed. The surf breaks off the north shore were a little less crowded than usual, but not much. Apparently even the end of the world wasn’t going to interfere with some people’s search for the perfect wave.

‘Governor’s office called, sir.’

Ritchie looked up from the drifts of paperwork that covered every square inch of his desk. A couple of pages had even dropped to the floor. His PA, Captain McKinney, bent forward and retrieved them.

‘Yes, Andrew? Good news, I hope?’

‘Mixed, Admiral. Curfew starts at 1800 sharp tonight. They couldn’t agree on the rationing though. But they have organised emergency flights from Tokyo and Sydney for any perishables or medical supplies that run low. The National Security Committees of both the Japanese and Australian cabinets are still meeting, but their local liaison staff have passed on messages from both prime ministers that they’ll give us whatever help we need.’

They’re the ones who’ll he needing help soon enough, thought Ritchie. But aloud he only said, ‘Well, that’s something at least. For now.’

The armed forces had considerable stockpiles of rations and medical supplies on the islands, but they didn’t store items like insulin for diabetics, or drugs for cancer treatment or a dozen other common maladies. Ritchie couldn’t help wondering just how much of a supply of antidepressants there was in Hawaii, and how many people were likely to kill themselves or suffer heart attacks or stress-related strokes in the next few days. Given the number of tourists from the mainland here, probably lots.

Nearly two-and-a-half decades earlier, he’d written his masters dissertation at Annapolis on the navy’s crisis management at Pearl Harbor. He’d been scathing of their efforts on 7 December, 1941. Now, faced with his very own calamity, he had to wonder if he would have done any better. There was just so much to do and so little to do it with. Events had accelerated to a point where he would possibly never catch up.

‘Thank you, Captain,’ he grunted, dismissing young McKinney, just as an officer in Army greens appeared at his door.

‘Colonel Maccomb, Admiral. I have your updates if you have a moment.’

Ritchie didn’t, but waved the man in anyway. Maccomb looked like he had run all the way over from the 500th Military Intelligence Brigade – a decent hike in the midday heat of the equatorial sun. PACOM was just months away from taking possession of a new headquarters, the Nimitz-MacArthur Pacific Command Center, which would have centralised everybody in one modern facility. It looked like they’d be sticking with the old campus now, however, necessitating a lot of time wasting as his subordinates remained scattered about all over the island.