Sean Penn is greeted as he arrives in Benghazi on Oct. 4, 2011.

Sean Penn visited Libya to assess the humanitarian needs of the people in Libya. Here he is in Benghazi on Oct. 4, 2011.

Sean Penn (center), after arriving at the airport in the eastern Libyan city of Benghazi on Oct. 4, 2011.

Hollywood star Sean Penn is greeted by a Libyan official upon his arrival in the eastern Libyan city of Benghazi on Oct. 4, 2011.

U.S. actor-activist Sean Penn talked to reporters outside his hotel during his visit to Tripoli, Libya, on Oct. 5, 2011.

Penn said he admires Libyans for their courage to overthrow Muammar Qaddafi.

Sean Penn poses for a photo with two Libyan women in Benghazi on Oct. 4, 2011.

Sean Penn (center) and Egyptian actor Khaled al-Nabawi (right) listen to a guide as they walk past the Sphynx during a tour of the pyramid plateau in Giza, south of Cairo, on Sept. 30, 2011.

Penn also visited Cairo's landmark Tahrir Square on the same day a mass rally was held to protest the military rulers' handling of the transition.

Holding an Egyptian national flag, actor Sean Penn, second right, and Egyptian actor Khaled El-Nabawy, second left, are flanked by protesters in Tahrir Square, in Cairo, Egypt on Sept. 30, 2011.

Tahrir Square was the focal point of the uprising that ousted President Hosni Mubarak.