Pakistan Peoples Party Chairman Bilawal Bhutto Zardari, says he has been in shock since terror attack at Peshawar army school which left 141 people dead. "The horrific attack by the Taliban on our nation's children in Peshawar has left me speechless. I am in shock and have been in mourning," he said through a verified Twitter account. "No more excuses. We must unite as a nation and bring these Islamic fundamentalists to justice once and for all," he further said.