Really? Lets start a little more broadly with the overall issue, ok. Forget the memo that guy was talking about. Thats got very little to do with this issue. Why you are so fixated on that is beyond me. The memo isn't an issue right now. Get an overall understanding of whats happened first.
BTW, you are far better than that link you posted...
try
this link as an appetizer and then move on to some outside sources of your own.
Also, try watching a few videos of the actual hearings from the first go round and then follow up with some of the newer ones from this week.
ETA - Here is the home page ...
http://issues.oversight.house.gov/fastandfurious/