My experience has been as follows. When such reports appear in the media then after a short while the US/NATO forces take military action against them. These media reports are for creating a mood. Usually the action is there withing ten days. Shorter that period and enough people would not hear the news and thus there might be a reaction against US/NATO action. Longer period after media report is also not conducive because people's mind do not retain info for long. So just wait and watch how the action unfolds.