The plan was later complicated in late 1985, when Lieutenant Colonel Oliver North of the National Security Council diverted a portion of the proceeds from the Iranian weapon sales to fund the Contras, a group of anti-Sandinista rebels, in their insurgency against the socialist government of Nicaragua. While President Ronald Reagan was a vocal supporter of the Contra cause, the evidence is disputed as to whether he personally authorized the diversion of funds to the Contras. Handwritten notes taken by Defense Secretary Caspar Weinberger on 7 December 1985 indicate that Reagan was aware of potential hostage transfers with Iran, as well as the sale of Hawk and TOW missiles to "moderate elements" within that country. Weinberger wrote that Reagan said "he could answer to charges of illegality but couldn't answer to the charge that 'big strong President Reagan passed up a chance to free the hostages. After the weapon sales were revealed in November 1986, Reagan appeared on national television and stated that the weapons transfers had indeed occurred, but that the United States did not trade arms for hostages. The investigation was impeded when large volumes of documents relating to the affair were destroyed or withheld from investigators by Reagan administration officials. On 4 March 1987, Reagan made a further nationally televised address, taking full responsibility for the affair and stating that "what began as a strategic opening to Iran deteriorated, in its implementation, into trading arms for hostages".