Lebanese caretaker Prime Minister Saad Hariri (C Front), along with other officials, pray as they pay respects at the grave of Saad Hariri's father, former Prime Minister Rafiq Hariri, during a ceremony marking the sixth anniversary of his death at Martyrs' square in downtown Beirut, capital of Lebanon, Feb. 14, 2011. On Feb. 14, 2005, Hariri was killed along with 22 others in a bomb attack in Beirut. [Xinhua/Koka]