Bring yourself to the game. Leave the cooler and backpack at home. The NFL is tightening stadium security starting this preseason, limiting the size and type of bags fans can bring to the game. The restrictions are designed to enhance security while speeding up entry into stadiums. With the exception of medically necessary items, only clear plastic, vinyl or PVC bags no larger than 12 inches by 6 inches by 12 inches will be allowed. One-gallon clear plastic freezer bags also will be OK, as will small clear plastic bags approximately the size of someone’s hand, with or without a...