Wait for it.
Rumsfeld emphasized this in his recent press conference:
Almost all first reports are wrong.
It is premature to make announcements that WMD have been found, or announcements of other kinds in many areas. Naturally, this also applies to definite pronouncements that nothing has been found.
I think that the best criteria for nailing the accuracy of a report is when a fact is officially announced by the Defense Department, in one of the briefings or press conferences. If they say they're not sure of something in these venues, I'd wait for more before jumping the gun.