Categories Today in Terrorism Today in Terrorism: November 20, 1979 – Siege at Grand Mosque in Mecca Post author By Phil Gurski Post date November 20, 2019 No Comments on Today in Terrorism: November 20, 1979 – Siege at Grand Mosque in Mecca Today is one of those days in history where I have an unfortunate richness in terrorist attacks to choose from. Tags 9/11, Islam, Saudi Arabia