From the revised core rulebook:
"In order for a unit outside a structure to attack an enemy unit inside a structure, the
enemy unit must be on a space that shows an exit."
Does this imply that as long as a defending unit is in front of ANY exit that it can be shot at, even if the attacking unit is shooting from outside a different exit that the defender is standing in. To give an example, my Blackhawk is standing in a square that is directly in front of a small exit/entrance to a building. Inside the building, 2 spaces away, is Lara. She is standing inside the entrance/exit of the building, albeit a different entrance/exit that the Blackhawk is outside of. Can the Blackhawk target Lara since there is LOS?