On McGee's vest in Afghanistan the flag is incorrect. In the vertical position the star field should be in the upper left.
Surveillance satellites don't work like that. They aren't conveniently in the right place at the right time, and they travel at about 7.7km/s so can't loiter over an area. Also, the resolution is not that high. The "satellite" footage is more reminiscent of a stationary drone.
The UN has a presence in Afghanistan; however, it does not undertake armed intervention in what is essentially a NATO mission. The armed UN support provided to Gibbs, McGee and the women in the shelter would, therefore, have been outside the UN operational parameters.
Abby analyses the acid and states it was 'Hydrofluoric Acid' (which would be 'HF') and the mass-spec plot shows 'Hydrofluoric acid' at the top. However, the two peaks marked on the plot are 'Fluorite CaF2' (the mineral form of Calcium Fluoride) and 'Sulphuric Acid (H2SO4)'.