Ground troops need to get where they're going quickly, and pausing to construct a bridge is a good way to not go anywhere quickly. This is the genius of armored vehicle-launched bridges. Just drive up to that creek or ditch, back this baby up and drop a bridge right on it. This LEGO version by Tommy Styrvoky not only looks the part in stunning detail and construction, it's fully functional with remote control. Check out the video to see it in action.