In 1985, members of the US National Security Council (NSC) secretly authorized weapons sales to Iran in an attempt to secure the release of US hostages held in Lebanon by pro-Iranian militias. Part of the $48 million profit was then diverted to Nicaraguan Contra rebels, in violation of a 1984 law banning such assistance. After a Senate investigation, NSC members Oliver North and John M. Poindexter were indicted and convicted of various offenses. Why were their convictions later overturned? Discuss (http://forum.thefreedictionary.com/postst74493_Indictments-Made-in-Iran-Contra-Affair.aspx)