This large "flower" hanging on this young man is a customary gift for major accomplishments. The officer on the left is the SJA for the KMTC - Kabul Military Training Center. He's one of the SJA's that I mentor. Next to him is his deputy. The young man on the left just graduated from Officer Basic. He worked in their office and was greatly liked. To show their respect and affection, the two officer presented him with this gift.
When we first got here, I saw several of these presented to the officers we were replacing. They are obviously of great significance to the Afghans. I also saw several men being given flowers as gifts. It's very different than what we would do, but then, this is a very different culture.