The missing scientists at the centre of a UFO conspiracy

Are the disappearances or deaths of 11 US scientists really linked in a nefarious plot?

Or just a conspiracy theory with roots in a bizarre broadcast that rocked Britain in the 1970s?

In the last few years, 11 people allegedly tied to top secret US research have died or mysteriously disappeared, sparking a conspiracy that a clandestine operation is silencing those who know too much.

As Phil Tinline explains to Nosheen Iqbal, what began as a series of unrelated tragedies has morphed into a mainstream obsession and even triggered a federal investigation.