Security increased, roads closed: How Pakistan is preparing for peace talks

As our chief international correspondent has just reported, Pakistan is preparing to host Iran and US delegations for peace talks this weekend. The nation is a key mediator in facilitating discussions between the two countries, who have agreed to a two-week conditional ceasefire. Here's what we know about the agreement between the US and Iran. Pictures show heightened security in Islamabad, as roads around the city’s Red Zone - where many government buildings and embassies are based – are also s