Bears' defensive injuries in training camp show how thin their margin is this season

The Bears are entering scary territory in their secondary. Injuries are piling up, and they’re searching the ends of their roster and free agents for answers. Issues like this aren’t a disaster with the season still more than a month away, but it’s an ominous sign of how precarious the plan is. That’s a secondary, by the way, that has a lot on its shoulders already because the Bears don’t have a proven pass rush that could make cornerbacks’ jobs much easier. The defensive star of practice…