Why in news?

• Iran displayed three ballistic missiles at an outdoor prayer esplanade in central Tehran recently as talks in Vienna aimed at reviving Tehran’s nuclear deal with world powers flounder.

About the missiles

• The missiles – known as Dezful, Qiam and Zolfaghar – have official ranges of up to 1,000 kilometers (620 miles) and are already-known models.
• Diplomats from countries that remain in the 2015 nuclear deal – Britain, France, Germany, Russia and China – are working with Tehran to revive the accord, which had sought to limit Iran’s nuclear ambitions in exchange for lifting of economic sanctions.