"They are to be psychologically evaluated following the tests as are required to attend to a psychiatrist for mandatory checkups."
Change 'as' to 'and'
"CRT TV in place between the clavicles."
'place' isn't needed.
"How this is possible regardless of obstructions is unclear."
Obstructions can block it, so it would regard obstacles. I would just remove 'regardless of obstructions' to make it sound better/more logical.
"RPC-135s screen"
*RPC-135's
"Indirect surveillance observation"
Surveilence and observation are synonyms, so they are redundant. I would remove one of the two.
"However, the harnesses were unable to exert sufficient force to prevent subjects from climbing into RPC-135's screen."
Remove this sentence. It begins with a conjunction and makes no sense. Wouldn't the researcers have wanted the subjects to enter 135 to see whats in there. This makes it sound like they tried to stop them from entering. Without this sentence the paragraph would make more sense.
I still like it :)