Some of the 'before' shots do show fingers inside the trigger guard and resting on the trigger. The point is that this particular approach to trigger discipline, where the trigger-finger is deliberately pointed and straight, is a new phenomenon, and is the result of training. Above all, it shows that the Taliban are not a mere grassroots movement of goatherds, but a trained military, whether they got that training from the USA, the Chinese, or the Iranians, or some other source.