Get On This Day delivered free to your inbox: br br br 1979 – The Ayatollah Ruhollah Khomeini returns to Tehran, Iran after nearly 15 years of exile. br br br br br 1587 – Queen Elizabeth I signs death warrant for Mary Stuart, Queen of Scots. br br br br 2007 – Smoking is banned in workplaces in France. br br br br 2004 – Janet Jackson's breast is exposed during the half-time show of Super Bowl XXXVIII.