Peshawar school attack: A tipping point for Pakistan?

The Pakistani city of Peshawar has begun burying its dead after a Taliban attack at a school killed at least 132 children and nine staff.

Prime Minister Nawaz Sharif declared three days of mourning and Pakistan's army struck at militants in the region.

World leaders voiced disgust at the Taliban's deadliest attack to date, which even its Afghan allies disowned.

The BBC's James Robbins reports on the implications for Pakistan's future.