The US space agency usually stays tight-lipped on the subject - due to the increasing number of seemingly outlandish claims about unidentified flying objects captured on live stream cameras mounted on the space station - but this only appears to fuel further the cover-up conspiracy theories.
Because NASA allows anyone to view the real-time cameras, which point out towards space by going online, many alien chasers devote hours to watching them looking or evidence of alien space craft.
There have been repeated claims that NASA shuts down the cameras after strange shapes begin appearing in space away from the ISS, currently occupied by UK astronaut Tim Peake and five others.
Yesterday, Express.co.uk exclusively revealed how a hoax buster had forensically examined footage from the live stream showing some of the alleged UFOs, and claimed to conclusively prove they were just reflected sunlight, known as lens flares, appearing on the camera.
NASA has now joined the debate and categorically denied it ever purposefully shuts off the live stream, or that any UFOs or alien craft have ever been detected from the ISS.
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