I really love this game, but the Sneak Peek campaign has me totally stumped. I get to the point where I have two enemy ground targets, plus the targeted air ship. My guns are disabled and the enemy target boxes show camera icons. I'm assuming that pressing the gun button trips the camera, but nothing seems to happen and the targets are unaffected by my actions. I wind up flying around in circles with nothing happening and no way of returning to my home base. The only way out of this campaign has been for me to simply crash my plane.
So, what exactly am I supposed to be doing? I've mastered the other campaigns, and am flying the planes well, but I just can't figure this one out. HELP!