A Libyan boy sits on a tank parked in Benghazi's Revolution square on May 15, 2011. Kadhafi's prime minister offered on May 15 a truce to the visiting UN special envoy to Libya, Abdul-Ilah al-Khatib, in return for an immediate NATO ceasefire, as an anti-regime revolt entered a fourth month. AFP PHOTO/ Saeed KHAN (Photo credit should read SAEED KHAN/AFP/Getty Images)

A Libyan boy sits on a tank parked in Benghazi's Revolution square on May 15, 2011. Kadhafi's prime minister offered on May 15 a truce to the visiting UN special envoy to Libya, Abdul-Ilah al-Khatib, in return for an immediate NATO ceasefire, as an anti-regime revolt entered a fourth month.  AFP PHOTO/ Saeed KHAN (Photo credit should read SAEED KHAN/AFP/Getty Images)