During the 2006 SECFOR mission in Iraq, then-Rolling Stone journalist Matt Taibbi spent a week rolling with one of the squads of the 158. He wrote about it in the July 2006 issue of Rolling Stone and produced the above video. Click on it to go to the Dropbox link for the 2.6 GB video. The print version of the story is available via the Wayback Machine. I've hosted the print version on Google Docs below in case it gets lost to time.