Several journalists state that the CIA used Mena Intermountain Municipal Airport in Arkansas to smuggle weapons and ammunition to the Contras in Nicaragua, and drugs back into the United States.[27][28] Some theories have claimed the involvement of political figures Oliver North, then vice president and former CIA director George H. W. Bush and then Arkansas governor Bill Clinton.[28][29]
From wikipedia, look there to chase footnotes for sources
https://en.m.wikipedia.org/wiki/CIA_drug_trafficking_allegations
Several journalists state that the CIA used Mena Intermountain Municipal Airport in Arkansas to smuggle weapons and ammunition to the Contras in Nicaragua, and drugs back into the United States.[27][28] Some theories have claimed the involvement of political figures Oliver North, then vice president and former CIA director George H. W. Bush and then Arkansas governor Bill Clinton.[28][29]