FORWARD OPERATING BASE TABAC, Afghanistan – In just a few short hours, I saw both sides of Sangin. On one hand, photographer James Lee and I visited a shura, or meeting, that brought together 67 boys and 25 girls at the gates of this base, the headquarters of Dog Company, 1st Battalion, 7th Marines, out of Twentynine Palms, Calif. Most of the children sat obediently in straight rows on the ground as two interpreters and two Marines with a Female Engagement Team taught lessons about geography, civics and poetry. A few hours later, we heard our first gunshots fired in…