Under Taliban control, Afghan girls write "letters to the world" from their secret school

Afghanistan, now once again under Taliban control, has banned girls from school after the sixth grade. Imtiaz Tyab found a secret school hidden in a quiet corner of Kabul, where girls aged 14 to 16 are working through advanced calculus.

Afghanistan, now once again under Taliban control, has banned girls from school after the sixth grade. Imtiaz Tyab found a secret school hidden in a quiet corner of Kabul, where girls aged 14 to 16 are working through advanced calculus.