Parents of 'American Taliban' release letter from son

The parents of John Walker, an American who fought for the Taliban, have released a letter in which the 20-year-old apologized for not contacting them sooner and told them he was safe.

Walker is held by US marines in southern Afghanistan. His parents released a copy of the letter yesterday, dated December 3 -- one day after he struggled from the shattered fortress where a bloody prison uprising was put down by the Northern Alliance, with British and US special forces.