The U.S. Invasion of Afghanistan
Following the U.S. invasion of Afghanistan, al-Zawahiri's whereabouts are unknown, but he is generally thought to be in tribal Pakistan. Although he releases videos of himself frequently (see Messages of Ayman al-Zawahiri), al-Zawahiri did not appear alongside bin Laden in any of them after 2003. However, despite a series of operations, they were unable to capture him.