It walks you through the whole sordid affair going on of illegal weapons transfer.
The reason there were no Marine guards or responsible American Diplomatic or Military presence was because Obama and Hillary were doing any one of a number of dirty deals, including some for personal enrichment or advancement, out of Benghazi that they would rather not have any official scrutiny.
Yep, worse than Fast and Furious and the IRS combined. Their nefarious plan backfired and the cover-up began.