I'm trying to get the Marathon Man achievment, but I think I've missed a terminal (#5), I know where it is but can't get back to it 
1) Is there anywhere I can check which Terminals I have visited?
2) If I restart the mission do I have to revisit all of the Terminals on that level?
TIA

1) Is there anywhere I can check which Terminals I have visited?
2) If I restart the mission do I have to revisit all of the Terminals on that level?
TIA