America Promises 'Relentless Pressure' on Iran

The United States says it will exert 'relentless pressure' on Iran as it restores sanctions targeting Iran's oil, banking and transport sectors. Newshour examines the humanitarian impact on Iran's people.

Also in the programme: Russia's GRU at 100 and the Earth's healthy ozone layer.

(Picture: US Secretary of State Mike Pompeo (L) and US Treasury Secretary Steven Mnuchin (R). Credit: EPA/MICHAEL REYNOLDS)