A Libyan military helicopter flies overhead at Tahrir Square during the celebration of the second anniversary of the revolution in Benghazi, Libya, Sunday, Feb, 17, 2013. Libya's interi

 

              A Libyan military helicopter flies overhead at Tahrir Square during the celebration of the second anniversary of the revolution in Benghazi, Libya, Sunday, Feb, 17, 2013. Libya
A Libyan military helicopter flies overhead at Tahrir Square during the celebration of the second anniversary of the revolution in Benghazi, Libya, Sunday, Feb, 17, 2013. Libya's interim President Mohammed el-Megarif called on Sunday for unity in the North African nation as it celebrates the second anniversary of the uprising that toppled longtime dictator Moammar Gadhafi but plunged the country into lawlessness and economic woes. (AP Photo/Mohammad Hannon)