Naval Station Great Lakes near North Chicago is calling off its popular Fourth of July Celebration this year due to a large number of other events scheduled to take place at the base the same week. Commanding officer Capt. Ray Leung announced the cancellation Tuesday, stating that the other events -- including a recruit graduation and a Navy ROTC graduation -- made it hard to plan the event while maintaining the same high level of safety festivalgoers expect. Rather than hosting a downgraded event, Leung decided to cancel it for this year. "We regret having to cancel this celebration.