Why can't I find the root instruction thread?

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http://forum.xda-developers.com – I'm looking to root the Sensation 4G by T-mobile but there isn't a thread labeled ROOT. What am I missing? My hboot is 1.18.0000 I searched the entire "sensation android development" page for the word root and nothing came up. All other phones I've dealt with have a sticky that says something about root instructions. Please someone point me in the right direction (HowTos)