That this is being supressed is a bold assertion. Doesn't this seem like an odd, arbitrary thing to suppress? In situations like these, it's been my experience that the more likely explanation is that the evidence for it is a lot more spotty than you and the authors of the articles you linked seem to think.

The things that give you tarter on your teeth are not nanobacteria. It's caused by normal bacterial digestion of sugar that produces plaque which hardens to tartar by interacting with minerals in saliva. Nanobacteria are not living

President Bill Clinton referenced the apparent discovery of extraterrestrial nano bacteria as did a Dan Brown novel. I wouldnt call extraterrestrial nano bacteria suppressed, just poorly supported.

From the last article you linked:

"In January 2004, President George W. Bush unveiled plans to send astronauts to the Moon in 2015 and shortly thereafter to Mars."

I remember when GW announced this. I had friends and colleagues who said things like "Wow. Maybe I should go work work at NASA give all the exciting stuff that will be going on there." Guess it didn't work out that way.

(In fairness, NASA did a lot of OTHER cool stuff in that time frame. Just not sending people to the Moon/Mars).

Interesting articles. What other things are you referring to?