Libyan revolutionary fighters celebrate the capture of a tank from pro-Gadhafi forces in Sirte, Libya, on Tuesday, Sept. 20, 2011. (AP Photo/Gaia Anderson)

Photo by: Gaia Anderson

Libyan revolutionary fighters celebrate the capture of a tank from pro-Gadhafi forces in Sirte, Libya, on Tuesday, Sept. 20, 2011. (AP Photo/Gaia Anderson)