In this photo released by Lebanon's official government photographer Dalati Nohra, Lebanese outgoing Prime Minister Saad Hariri addresses the nation in Beirut, Lebanon, Tuesday, Jan. 25, 2011. Lebanon's president formally appointed billionaire businessman and former premier Najib Mikati as prime minister-designate Tuesday and asked him to form a new government after two days of polling lawmakers on their choice of prime minister. Mikati defeated U.S.-backed Saad Hariri, who was prime minister from 2009 until the Iran- and Syrian-backed Hezbollah forced his government to collapse two weeks ago. (AP Photo/Dalati Nohra, HO) EDITORIAL USE ONLY, NO SALES