Iran pushes back at Trump warning, stresses need for ballistic deterrence

A display featuring missiles and a portrait of Iran's Supreme Leader Ali Khamenei is seen at Baharestan Square in Tehran, Iran September 27, 2017.
A display featuring missiles and a portrait of Iran's Supreme Leader Ali Khamenei is seen at Baharestan Square in Tehran, Iran September 27, 2017.

An Iranian vice president on Tuesday defended Tehran’s ballistic missile capabilities as essential for deterrence, after the US president warned of further attacks if Iran moves to develop its missile program which was severely damaged in a June war.