ISLAMABAD: 18th death anniversary of ex-controller PTV and social figure Aun Mohammad Rizvi will be observed at Markazi Imambargah, G-6/2, at 10 a.m today. Allama Syed Shahanshah Naqvi, Shaukat Raza Shaukat, Syed Iqbal Shah Bajar, Ijaz Hussain Mudarris, Firdous Aalam, Mir Hasan Mir, Hasan Sadiq and Qari Najam Mustafa will address gathering after Quran Khawani.