Me and a mate gave that a quick shot, before quickly giving up and just doing the tunnel again as well.Myself @swooshboy and @DatIrishFella tried to do the power plant challenge, it wasn't my first attempt, it was their first attempt at a challenge and they picked a bad one to start with, we couldn't get in the door, the shotgunners sprinting out in the second or third wave just got us big time, i quickly got them to do the easier Lincoln tunnel challenge, it took a while but we got it done.
I really need to get some gear to boost my health because its not that good at them moment