Trailer of the darkest days of our history - upcoming documentary recounts the horror of the APS massacre. <br />APS attack <br />Peshawar school Attack <br />Peshawar <br />Khyber Pakhtunkhwa <br />Pakistan <br />Operation Zarb-e-Azb <br />Khawarij <br />Pakistan Army <br />Pakistan Rangers <br />SSG
