Nanochain
 

A microchain that closely resembles a bicycle chain except that each link could rest comfortably atop a human hair has been fabricated at the Department of Energys Sandia National Laboratories.

http://www.sandia.gov/media/NewsRel/NR2002/chain.htm

Anything is possible if ones mind is used to the fullest extent. In the next 50 years there are going to be some incredible scientific and technological developments, and I hope I'm around to see just some of them. Space travel, speeders like in Star Wars to replace normal cars...the possibilties are endless.

Are they going to make bicycles for germs now?

Nanomachines are a very real possibility. If computers are intentionally
delayed and were already what we (at present) have, imagine the kind of
technology they're experimenting with...

It isn't a question of how... but when(?). This is when things will get VERY
interesting: could you create a weapon that could not be seen or smelled,
yet would kill every single black man in a room ?

Yup, you got it.

yes i think it will be done