The sun was directly overhead when Mexico City Approach first picked up the transmission.

"Mexico City Approach, Nova Transit One, passing flight level two-eight-zero, descending, vertical approach profile, inbound Benito Juárez International."

The approach controller, a woman named Catalina who had been at her station since six in the morning, looked at her display.

The transponder return had appeared at the exact moment the transmission came through, with clean signal, correct squawk code and the callsign matching the pre-filed coordination notice exactly.

She was surprised that the space shuttle was actually communicating with the control tower, as this was the first time it has happened.

She didn’t think too much about it and keyed her response. "Nova Transit One, Mexico City Approach, radar contact, descend and maintain flight level one-five-zero, proceed direct Juárez, expect landing zone clearance on tower frequency."

"Descending to flight level one-five-zero, direct Juárez, Nova Transit One."

The voice was calm and unhurried. Catalina had been briefed on the operation two days ago. She had read the coordination notice, the technical specifications, and the approach vector filed that morning. She had told herself she was prepared.

She watched the return descend on her display and said nothing to the controller beside her, who was also watching it. Both of them were tracking the same thing and neither of them had anything useful to say about it yet.

***

Outside, the noon sun lit the Valley of Mexico in flat white light.

The crowds had been gathering since before dawn along the public roads bordering the airport perimeter. The word had spread the same way it had spread at every designated airport, with photographs of unusual activity near the terminal, the particular pattern of security deployment that people had learned to read and the calculation of dates against the announced timeline.

Benito Juárez International sat in the middle of the city. Unlike JFK, there was no distance between the airport and the population surrounding it. The terminal buildings were visible from the adjacent neighborhoods, the flight paths running directly over residential streets and markets and the elevated expressway that circled the airport’s eastern edge.

People had climbed onto rooftops and the expressway had slowed to a crawl, with drivers leaving their windows down or stepping out entirely, phones raised toward the sky.

The news vans had positioned along every available stretch of perimeter road, satellite dishes extended, reporters delivering live commentary to audiences across Latin America who had been awake since early morning.

A reporter from a Mexico City morning program had been live since ten, filling airtime with context and speculation while the sky above the landing zone showed nothing.

At flight level one-eight-zero, the shuttle became visible.

Not to the naked eye yet, because at that altitude, from the perimeter roads, it was a point of light catching the noon sun, moving against the blue sky in a way that was wrong for any aircraft, as it simply descended vertically from directly above the landing zone.

The reporter saw it first through her camera operator’s lens.

"We have visual contact," she said, with a steady voice.

"Mexico City Approach, Nova Transit One, passing flight level two-zero-zero."

"Nova Transit One, contact Juárez Tower on one-one-eight decimal seven, good day."

"One-one-eight decimal seven, Nova Transit One, good day."

***

Inside the tower cab at Benito Juárez, the senior controller on duty was a man named Roberto Flores who had worked the same position for nineteen years.

He had controlled landings during thunderstorms, during fog that reduced visibility to fifty meters, during an emergency once that he still didn’t like to think about but he had not controlled anything like this.

"Juárez Tower, Nova Transit One, descending through flight level one-zero-zero, vertical approach profile, requesting landing zone clearance."

Flores keyed his response. "Nova Transit One, Juárez Tower, radar contact confirmed, landing zone is clear, winds calm, you are cleared to land, landing zone November-Tango-One."

"Cleared to land, landing zone November-Tango-One, Nova Transit One."

He looked at his display. The return was descending through eight thousand feet. Seven. Six.

The space shuttle hadn’t turned on stealth mode throughout their journey, keeping to what was specified in the technical specification document sent to each airport.

Flores looked through the tower cab glass and he could see the space shuttle clearly now. It was like a dark shape against the noon sky, descending vertically above the landing zone. Large. Much larger than the altitude made it look at first, and growing as it came down.

He had been looking at aircraft for nineteen years and his brain kept trying to assign it to a category and kept failing because the category didn’t exist. It was the right size for a commercial aircraft but it was moving like nothing he had ever tracked.

"Juárez Tower, Nova Transit One, short final, vertical descent continuing, three thousand feet."

"Nova Transit One, traffic is clear, continue descent."

"Continuing descent, Nova Transit One."

Flores set the handset down and watched through the glass.

***

The reporter had been tracking it since flight level one-eight-zero and her camera operator had held the frame steady through the entire descent.

By two thousand feet the shuttle was visible to the naked eye from the perimeter roads. Though the crowds had seen it before then, but at two thousand feet there was no longer any question about what they were looking at.

On the expressway above, someone had stopped their car completely and stepped out onto the barrier, phone raised, looking straight up.

At five hundred feet the crowd heard the hum of the space shuttle. It was the same low chest-felt pressure that people at JFK had described and that every person watching the JFK footage had tried to imagine. The grass at the edges of the landing zone pressed flat. Loose material shifted outward in a clean radial pattern.

The shuttle descended through three hundred feet. Two hundred. One hundred.

At fifty feet the hum deepened slightly and the tarmac surface around the landing zone responded

The shuttle finally touched down on the tarmac.

The reporter had stopped talking. She stood with the microphone at her side and looked at the shuttle on the tarmac and said nothing for a moment.

Then she said, quietly, to no one and to everyone: "Aterrizó." 𝑓𝘳𝘦𝑒𝑤𝑒𝘣𝘯ℴ𝘷𝘦𝓁.𝑐𝑜𝑚

Her camera operator kept the frame steady and neither of them moved.

Flores, in the tower cab, was still looking through the glass. The shuttle sat on the landing zone, dark and still, the noon sun hitting its hull without reflecting.

He picked up the handset.

"Nova Transit One, Juárez Tower, clear of all traffic. Welcome to Mexico City."

"Juárez Tower, Nova Transit One, thank you. Platform deploying."

Flores set the handset down.

He looked at the return on his display. It was stationary, clean and exactly where it had said it would be. Then he looked through the glass at the shuttle itself, sitting on the tarmac in the flat noon light of the Valley of Mexico.

***

The boarding platform descended and the staff stepped off one by one, the noon heat hitting them immediately, making them to miss the climate-controlled interior of the shuttle.

The lead Synth stepped off last and moved to stand beside the group. The other two Synths moved without instruction and took up their positions at each side of the platform.

The staff stood together on the tarmac and waited.

The platform ascended.

Thomas looked at the terminal building across the tarmac. Through the glass wall of the designated lounge he could see the airport authority representative standing inside, watching.

He turned his attention back to the platform and he saw it descending.

A large metal box sat at the center of it, dark and clean, roughly the size of a military cargo crate, except that it was lower and wider than one, with its surface unmarked except for a small recessed screen on the near face. A Synth stood beside it, one hand resting on the handle fitted along the box’s side.

When the platform reached the tarmac, the Synth pressed the screen.

A low frequency sound came from the base of the box and then the box lifted, rising perhaps twenty centimeters from the platform surface and held there, perfectly level, the gap between its base and the ground steady and unmoving.

The Synth gripped the handle and stepped forward off the platform, pulling the box with it. The box moved with the same ease as if it was completely weightless, tracking the Synth’s path without resistance, floating beside it at a fixed height as they cleared the platform and stopped on the tarmac.

Several of the staff were watching with expressions that say they have no idea what to say, because they didn’t. Thomas had no idea that the box could levitate. If he did, he might had tried it out.

The platform ascended again and they continued waiting.

When it descended the second time the box on it was larger, more than half again the size of the first, the same low wide geometry but more substantial, occupying most of the platform’s surface area, the Synth beside it standing at the near edge.

The platform reached the tarmac. The Synth pressed the screen. The same low frequency sound was heard and the box lifted, held steadily at twenty centimeters.

The Synth gripped the handle and stepped off, pulling the second box alongside the first. The two boxes floated at identical heights, their bases level with each other, the two Synths holding their respective handles with the particular stillness of systems performing a task they had performed many times.

The platform ascended one final time and did not return.

The lead Synth looked at the staff.

"We can proceed," it said.

They nodded and started walking towards the terminal.

The two unloading Synths moved with their boxes, the floating containers tracking silently beside them across the tarmac. The two guard Synths remained at their positions beside the platform.

Thomas walked beside Dr. Brenner but neither of them said anything. The noon sun was directly overhead and their shadows were directly beneath them and the shuttle sat behind them getting smaller as they crossed the tarmac toward the terminal.

Dr. Yuna Park was watching the boxes as she walked. The larger one was moving at the same pace as the Synth pulling it, maintaining a fixed distance from its handler regardless of the Synth’s speed.

She looked forward again and kept walking.

The terminal doors opened automatically as the lead Synth approached. The airport authority representative was already moving across the lounge to meet them, with his team behind him.

He stopped in front of the lead Synth, then looked at the staff, then at the floating boxes now cleared inside the terminal, then back at the staff.

"Welcome," he said. He extended his hand to Thomas, who was closest. "Everything is ready for you."

"Thank you," Thomas said, shaking it. He looked around the lounge — the seating arranged along the walls, the medical support station set up in the far corner, the accessible corridor to the boarding zone already cleared. The coordination visit had produced exactly what it had promised.

He looked at the lead Synth. The Synth gave a small nod.

Thomas turned back to the room.

"Let’s get set up," he said. "The first volunteers will be here within the hour."

The staff moved, dispersing through the lounge with the focused attention of people who had spent two weeks preparing for exactly this and were now inside the moment they had been preparing for.

Outside, the crowds along the perimeter roads had not dispersed. They were still watching, still recording, still waiting — though what they were waiting for now was something different

They were waiting for the volunteers.