News that a former US defence insider is claiming that the Pentagon, defence contractors, and the like are secretly hording the remains of crashed alien craft and their dead crew members would be very interesting, nay extraordinary news, if even a scintilla of evidence had been produced.

I mean, some alien DNA, a circuit, a piece of a spacecraft, something which conclusively demonstrates that the allegation (which is all it is) is true. I won't be holding my breath!

Imagine this. An alien civilisation, so advanced on us that they can send spacecraft across interstellar space, negotiating all the hazards and technological challenges that that presents, at speeds that we cannot imagine, and preserving the crew on the journey, arrives on Earth only to crash land. Plausible? What do you think?