During the wind storm Sgt. Colbert walks around between the tents with sand and debris blowing all around, yet his T-shirt stays smooth and doesn't move.
The scope that Sgt. Brad 'Iceman' Colbert uses on his weapon is a "starlight scope". It is a type of night vision that would not be used during daylight hours.
(at around 18 mins) Lance Corporal Trombley is reading a Hustler magazine dated from October 2003, when the scene takes place in March 2003.