A robot that looks like something out of Aliens.

[Locut0s]

http://www.disinfo.com/2009/11/pentagon-unveils-new-chembot/

Reminds me of the face suckers for some reason. Or the blob.

 

[Newbian]

and navigate through small openings, such as tiny wall cracks

Don't we have that figured out...it's called blowing bigger holes into the wall so we can look inside?