A Libyan boy flashing a "V" sign sits on the barrel of a destroyed army tank as he and other youths celebrate the freedom of the Libyan city of Benghazi on Monday, Feb. 28, 2011. The United States pressed its European allies on Monday to set tough sanctions on the Libyan government, while doubts emerged about the feasibility of a proposed no-fly zone to prevent Moammar Gadhafi's regime from launching aerial attacks against protesters. (AP Photo/Hussein Malla)

Photo by: Hussein Malla

A Libyan boy flashing a "V" sign sits on the barrel of a destroyed army tank as he and other youths celebrate the freedom of the Libyan city of Benghazi on Monday, Feb. 28, 2011. The United States pressed its European allies on Monday to set tough sanctions on the Libyan government, while doubts emerged about the feasibility of a proposed no-fly zone to prevent Moammar Gadhafi's regime from launching aerial attacks against protesters. (AP Photo/Hussein Malla)