Channel 4 News takes a closer look at the hurdles between Israel and an attack on Iran.

The mounting tension over Iran's nuclear ambitions could escalate into "a new Cold War", William Hague has warned.

Amid continued sabre-rattling from Tehran and the west over an EU oil embargo and the free movement of oil ships through the Straits of Hormuz, Channel 4 News looks at the increasing tension.

An Iranian nuclear scientist has been killed by a bomb placed on his car by a motorcyclist in Tehran, the fourth such attack on nuclear experts in the country in two years. Lindsey Hilsum reports.

Defence analyst Anthony Tucker-Jones assesses where conflicts are most likely to erupt over the next 12 months.

Tehran says it has successfully test-fired two long-range missiles during military exercises in the Gulf, amid rising tensions between the west and Iran over its nuclear programme.

As Iranian diplomats leave the UK on the orders of William Hague, Channel 4 News hears that the move is a blow to "ordinary" Iranians.