Prior to insertion, the "Ground Branch" team states that they are going to insert via fast rope due to there being no viable landing zone. What they actually do next is rappel form the helicopter using a harness. Fast roping doesn't use a harness. The operator simply grabs the rope (which is much thicker than that used in rappelling) and uses his feet to control his rate of descent.
The helicopter carrying the 'Ground Branch' members of the CIA on what is supposed to be a covert insertion has a clearly visible tail rotor number.
The Ground Branch team that infiltrates the clinic are wearing conventional MARPAT fatigues and gas masks while searching for the smallpox. In reality they would be wearing MOPP(Mission Oriented Protective Posture) gear when searching for something as deadly as smallpox especially when vials containing it have been broken.