They may not be allowed too, but a lot of them do. I have heard that from two friends, on in the marines and one in the army.

One of them bought some weed and a hookah for his food rations for the day and a goat. That's according to him, he may have exaderated or completely made the story up.
JaggedEdge Reviewed by JaggedEdge on . Weed Fields of Afghanistan!! Guys check it out!! LiveLeak.com - Weed Fields of Afghanistan A U.S. Army unit stumbles upon a very large um...treasure? Wonder if they smoked any of it. I hope they didn't burn the field down. Rating: 5