Hi. First off, I really enjoy this campaign, very hard. However, I cannot place the C4 on the control panel in mission Combat Dawn. 1) I have tried doing all other objectives then the control panel 2) I have tried doing control panel first 3) I always make sure the helicopter crashes to the ground from the starting intro part 4) I have tried blowing up the walls around the marker and have walked, crouched and laid down all around it to no avail. Solution: Start level again, loading from previous level. Do the control panel first. After a number of goes you can place the C4 Problem 2: Stairs in Ghost town level. . . Thanks.