A nuclear event would fit that and could certainly happen in the next 20 years -- - Israel bombing all suspected Iranian nuclear facilities. Iran retaliating w

A nuclear event would fit that and could certainly happen in the next 20 years -- - Israel bombing all suspected Iranian nuclear facilities. Iran retaliating with a nuke. - Low level or dirty bomb by any number of terrorists groups in the world. India/Pakistan is a pressure cooker right now. Could happen in Europe, the Mid-East or America.