Riddick Butcher Bay for the 360 ***HELP***

I bought dark athena but decided to play butcher bay first. I have looked everywhere and cant seem to get a straight answer.

I got into the mines and when I passed the security checkpoint. I dropped behind the robot and went through the door. In the next room there are two catwalks with guards on the right catwalk. I cant seem to get past them. Can anyone help?

Could someone help, I really want to continue the game but I cant get past this part.

Kill them?

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