Another Mass Grave in Iraq

How many more are there? I don’t we will ever know, even remotely. The people who dig such things don’t tend to promote their presence, just as those who bury WMDs are not likely to tell us where they are (Syria? Lebanon?). All such revelations are happy/unhappy acidents. As for the WMD part of the equation, can anyone paying the slightest attention to revelations about Syrian government say these thugs had nothing to do with the disappearance of weapons from Iraq?