TUNIS, TUNISIA - JANUARY 21:  Tunisian flags hang at half mast behind the flower adorned barrel of a tank  on January 21, 2011 in Tunis, Tunisia. Tunisians have begun three days of mourning in respect of the people who died during the  'Jasmine Revolution' to oust  president Zine al-Abidine Ben Al who fled the country a week ago.  (Photo by Christopher Furlong/Getty Images)