Looks good, but I would change the helicopter model, because usually secret service, SWAT, e.t.c don’t really land on a hospital helicopter(or casual, however you would call it). Try using a more militarised one and open the doors of it, so it looks like they climbed out of it, also make the background darker, kind of hurts my eyes a little.
The GFX looks good! I’d say improve on what is said above, also, I feel like that part that is left of the front left soldier just feels way too bright. Also, what are those random red marks in front of the helicopter’s exhaust part?
Apart from that, it looks good, maybe though change it into a night time scene