"The rest, we ran four miles every morning, and by night they were too tired to get into trouble." Powell's prescription worked, and the tensions that had led to race riots before his arrival abated. After additional service in Washington and an assignment as a brigade commander in the 101st Airborne Division at Fort Campbell, Kentucky, Powell returned to Washington in the late 1970s, attaining the rank of major general and holding advisory posts in the Pentagon and briefly in the Department of Energy. He next served at Fort Carson, Colorado, and at Fort Leavenworth before becoming military assistant to Weinberger, then secretary of defense in the Reagan administration, in 1983. While Powell was assisting Weinberger, the National Security Council (NSC) began looking at the possibility of sending American missiles to Iran in the hope of expediting the release of American hostages in the Middle East and turned to Powell to provide certain information about the missiles desired by Iran. Powell complied but subsequently questioned the scheme in writing, reminding the NSC leadership that there was a legal obligation to inform Congress of the proposed arms transfer. When it was pointed out that the plan had presidential authorization, Powell did what was requested of him. The illegal missile transfer was later exposed as a key element in the controversial Iran-Contra scandal. Powell's demonstrated record of opposition to the illegality of the transfer and his excellent demeanor in testifying before congressional investigating committees served him well. In June 1986 Powell received a choice corps command in West Germany but left it after six months at President Reagan's request to become Frank Carlucci's deputy on the National Security Council. Carlucci was endeavoring to rebuild the NSC after the Iran-Contra debacle. In 1987 Powell replaced Carlucci as national security adviser, a post he held for the duration of the Reagan administration. Arms control and attempts to topple the Sandanista government of Nicaragua ranked high on the agendas of Powell and of other key policy-makers during this period. When President-elect George Bush advised Powell that he wished to name his own national security adviser, Powell could have chosen to leave the army to earn a substantial income on the lecture circuit or perhaps in the business world. Money, however, was not sufficient inducement for Powell to retire; promoted to full (four star) general, he took over the army's Forces Command, which had responsibility for overseeing the readiness of over a million regular, reserve, and National Guard personnel based in the United States.