This article was developed by Allen W. McDonnell, Steve Payne, Eric 
Oppen and John Braungart, first appearing on Today in Alternate History.  
19 Oct 2017: The experimental probe USS Arthur Trudeau
 intercepted an interstellar object 33 million km from Earth (about 85 
times as far away as the Moon) as it was already heading away from the Sun.  
First identified by astronomers at the Haleakala Observatory, this 
mysterious object had been assigned the descriptive name "Oumuamua", the
 Hawaiian term for "Scout".
A consortium of space-faring nations had worked around the clock to develop the unmanned probe in record time.  The result, the USS Arthur Trudeau, was powered by gravitic propulsion technologies that had been reversed 
engineered from the Roswell UFO seventy years earlier. The architect of 
that ground-breaking project was in charge of Army Research and 
Development,  Lt. General Arthur Trudeau. As the functional head of the 
Foreign Technology Desk, he had been put in charge of working with 
private industry to reverse-engineer equipment of foreign origin that 
had been captured by the American forces. 
A thorough 
investigation of the 1947 Roswell UFO determined that the "flying disc" was 
an unmanned probe of extraterrestrial hardware. Although the individual 
components were vastly superior to human technology, the fundamental 
sub-system design was recognizable. The two notable exceptions were the 
"intelligent" exterior metal which looked like aluminum foil but had the
 startling ability to return to its original shape. After years of not understanding heads nor tails of the engines other than that they should be ones, researchers unraveled the 
anti-gravity sub-system.
The recognizability of similarities in designs with primitive human technology overcame the No Copying Allowed theory 
proposed by science fiction author John W. Campbell, Jr. He had argued 
that it would be simply impossible to understand futuristic technology, 
even of human origins, writing, "The  proposition
 involving the science-fiction hero who captures an enemy device, brings
 it home, copies it and puts it into production is being abandoned in 
modern stories.  But the actual difficulty of such a problem is always 
interesting and worthy of consideration.  Only recently has Earth's own 
technology reached the point where such copying is not possible; today 
it is definitely impossible in a large field of devices."
Campbell was only partly wrong, because the
 two decades between Roswell and Apollo 11 were insufficient to fully 
take advantage of the technologies present in the craft. However, the 
emergence of microchips and understanding of subatomic particles gradually brought anti-gravity technology into human understanding, which continued to develop under the auspices of the United Nations. By the third 
decade of the twenty-first century, there were increasingly loud calls 
for a truly international deep space program that could exploit the Roswell 
Technologies and take mankind forward more quickly. Cynics had long 
suggested that a second alien crash was the breakthrough needed to force
 such a change.
Without the enhanced acceleration of gravitic engines, it 
would never have been possible to have intercepted an object moving at 
such velocity before it left the Solar System forever. Capturing Oumuamua was a lucky 
break because even more secrets were revealed than from the New Mexico 
Crash. Alternate history would repeat itself--once again, the  
technology of extraterrestrial origin was recognizable to human 
development and yet sufficiently advanced to permit reverse engineering.
Oumuamua
 was an alien lightsail, an ultra-thin object deflecting charged 
particles radiated by the Sun as a plasma wind to achieve excess 
acceleration. Over the next few decades, the application of Oumuamua  
mass-density technologies would enable an even bigger leap-frog in deep 
space. In a second application,  Oumuamua  technology acted as a braking 
mechanism to decelerate starships from relativistic speed.
Unfortunately,
 external markings on Oumuamua were obscured by years of damage from space debris; however, linguistic experts surmised that Oumuamua did not originate from
 the Roswell aliens. More disappointingly, Earth scientists were unable 
to determine whether the lightsail was detached from a larger vessel as many surmised. Certainly there was no evidence of communication 
technology, and therefore it was maddeningly unclear  whether this was a 
reconnaissance mission being undertaken.
The two events, 
seventy years apart, gave the space program a tremendous impetus. Even more than that, the calculation that alien contact was inevitable drove 
scientists to further develop space technology to ensure that humanity 
was prepared for such a historic first meeting.
Author's Note:
In reality, astronomers 
concluded that Oumuamua is most likely a natural object. A small number 
of astronomers suggested that Oumuamua could be a product of alien 
technology, but evidence in support of this hypothesis is weak. Roswell 
has been described as "the world's most famous, most exhaustively 
investigated, and most thoroughly debunked UFO claim".
Provine's Addendum:
While many humans looked toward the stars for the next great moves of civilization, others were more focused on setting our own house in order before reaching out. Applications of the Roswell Technologies had transformed the Earth with green-energy reactors and no-emission vehicles lifted by anti-gravity fitted with memory-metals that had reduced crash fatalities to nearly zero. Weather satellites broke up hurricanes and shifted rain to drought-stricken areas. Hunger and natural disasters (other than geological ones) looked soon to be things of the past.
Calls for extending humanity's reach continued and were increasingly heard as AI automation took over most traditional jobs in industry and agriculture. Skeptics pointed out that colonies on the moon and Mars were largely research stations and political stunts rather than being grand metropolises of the future, though these would likely serve as the first signs of big things to come as many compared them with Jamestown in North America.
