When 9/11 hijacker Khalid Almihdhar leaves the US in June (see June 10, 2000), he flies to Frankfurt, Germany, and then to Oman in the Middle East. [US Congress, 7/24/2003, pp. 135 ] From there he returns to his family’s home in Sana’a, Yemen. [9/11 Commission, 7/24/2004, pp. 237] His wife and children live at an al-Qaeda communications hub that is run by his father in law, Ahmed al-Hada. The hub is being monitored by the NSA and CIA. Phone calls to and from the hub, including ones made by Almihdhar and other hijackers, are intercepted, rooms in the building are bugged, and spy satellites record visitors (see Late August 1998, Late 1998-Early 2002, and Early 2000-Summer 2001). Based on information gained from monitoring this house, the CIA and local intelligence services mounted a major operation against Almihdhar, other hijackers, and several more al-Qaeda operatives in December 1999 and January 2000, when they were followed around the Middle East and South Asia and monitored during an al-Qaeda summit in Malaysia (see December 29, 1999, January 2-5, 2000, and January 5-8, 2000). So presumably US intelligence should have been aware of this visit to the hub and who Almihdhar was, but what exactly was known and who may have known it has not been made public. He will return to the hub in February 2001 and stay an unknown length of time (see February 2001).