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As the fallout from November's bloody siege in Mumbai focuses the world's attention on Pakistan's ability to control enemy fighters within its own borders, Al Jazeera investigates Pakistan's role in the so-called war on terror. In this exclusive two-part series, Rageh Omaar travels from the capital, Islamabad, to the tribal heartlands to chart the spread of suicide bombings and the escalation of violence that has turned Pakistan into a war zone.

In the second part of Pakistan's War, Rageh Omaar joins the Pakistani army in their full-scale military offensive against fighters on the frontier with Afghanistan. In Bajaur province – where Ayman al-Zawahiri, al-Qaeda's second in command, is believed to be hiding – Rageh witnesses a decisive moment in the army's campaign.

He follows infantry from house to house in their advance on the Taliban stronghold of Loe Sam and is forced to retreat when the army unit he is filming comes under fire from Taliban fighters. Throughout his five-week journey, Rageh Omaar discovers the cost of the campaign for Pakistan.

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About Al Jazeera - Witness

Rageh Omaar presents Witness, a half-hour daily documentary series which features short, specially commissioned or acquired films gathered from independent filmmakers.
 
Each documentary reveals the unknown lives of ordinary people, following their lives, telling their stories and portraying the challenges that confront them. Our witnesses are people in a situation or those who have observed them first hand.
 
The films cover conflict, belief, the past and the future and as well as bringing new stories to light they showcase the talents of a new breed of multi-skilled, frontline journalist. In the studio, Rageh will further explore the issues raised in the films, with expert guests on the subject matter and the filmmakers themselves.