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This week's program goes to the 'tip of the spear' with elite commandos trapped in a lethal and protracted gun battle in Afghanistan. "It's not like TV, it's not a movie, this is for real" says army chaplain Padre John Sanderson. Earlier this year Corporal Cameron Baird was awarded a posthumous Victoria Cross for his raw courage in the heat of combat. In this concluding episode, his commando colleagues provide a rare, poignant and riveting account of those fatal hours...