Rogue regimes can use such meetings as a dilatory tactic to stall sanctions against them.  Nuclear countries like North Korea and Iran have been keen to use such a meeting as a stalling tactic against the onslaught of sanctions prompted by its nuclear programme [1] . Negotiations can be continually spun out with very little result in order to keep the United States from taking action simply by encouraging the United States to believe that there will be action after a meeting. Again, if there is no cost to them sitting down to negotiate, then negotiations are an easy way to deflect pressure, while they continue to pursue their nuclear and WMD programmes. As a result the preconditions need to be met before the negotiations to prevent such tactics from being possible.  [1] Yeranian, Edward. “Iranian President Offers to Meet President Obama.” Voice of America. 2 August 2010.