Since Saudi Arabia houses Mecca and Medina, Islam's holiest sites, many Muslims were upset at the permanent military presence. The continued presence of U.S. troops in Saudi Arabia after the war was one of the stated motivations behind the 11 September terrorist attacks, the Khobar Towers bombing, and the date chosen for the 1998 U.S. embassy bombings (7 August), which was eight years to the day that U.S. troops were sent to Saudi Arabia. Osama bin Laden interpreted the Islamic prophet Muhammad as banning the "permanent presence of infidels in Arabia". In 1996, bin Laden issued a fatwa, calling for U.S. troops to leave Saudi Arabia. In a December 1999 interview with Rahimullah Yusufzai, bin Laden said he felt that Americans were "too near to Mecca" and considered this a provocation to the entire Islamic world.