Rampant gang violence has surged in Haiti, one of the poorest nations in the world, with authorities struggling to cope.     Swathes of territory are under the control of rival armed gangs who carry out widespread murders, rapes and kidnappings.      Our chief correspondent Stuart Ramsay and senior foreign producer Dominique van Heerden have been in Haiti, where they saw parents taking children to school approach a Port-au-Prince intersection as automatic gunfire bursts from the turret of an armoured police vehicle rang out.      They join Niall Paterson to share their experience back in Haiti, what it's like covering warzones, and what’s next for the people of Haiti.      Producer: Soila Apparicio