the right-wing Contras. Congress, which favored negotiations between the Contras and Sandinista, passed the 1982 Boland Amendment, prohibiting the CIA and Defense Department from using their budgets to provide aid to the Contras. Still intent on supporting the Contras, the Reagan administration raised funds for the Contras from private donors and foreign governments. When Congress learned that the CIA had secretly placed naval mines in Nicaraguan harbors, Congress passed a second Boland Amendment that barred granting any assistance to the Contras. During his second term, Reagan sought to find a way procure the release of seven American hostages held by Hezbollah, a Lebanese paramilitary group supported by Iran. The Reagan administration decided to sell American arms to Iran, then engaged in the Iran–Iraq War, in hopes that Iran would pressure Hezbollah to release the hostages. Secretary of Defense Weinberger and Secretary of State Shultz both opposed the arrangement, so it was handled by National Security Advisor Robert McFarlane and McFarlane's successor, John Poindexter. The Reagan administration sold over 2000 missiles to Iran without informing Congress; Hezbollah released four hostages but captured an additional six Americans. On the initiative of Oliver North, an aide on the National Security Council, the Reagan administration redirected the proceeds from the missile sales to the Contras. The transactions became public knowledge by early November 1986. Reagan initially denied any wrongdoing, but on November 25 he announced that Poindexter and North had left the administration and that he would form the Tower Commission to investigate the transactions. A few weeks later, Reagan asked a panel of federal judges to appoint a special prosecutor who would conduct a separate investigation, and the panel chose Lawrence Walsh. The Tower Commission, chaired by former Republican Senator John Tower, released a report in February 1987 that confirmed that the administration had traded arms for hostages and sent the proceeds of the weapons sales to the Contras. The report laid most of the blame for the operation on North, Poindexter, and McFarlane, but it was also critical of Regan and other White House staffers. In response to the Tower Commission report, Reagan stated, "Its findings are honest, convincing and highly critical...As angry as I may be about activities undertaken without my knowledge, I am still accountable for those activities." The Iran–Contra scandal, as it became known, did serious damage to the Reagan presidency, raising questions about Reagan's competency and the wisdom