With the NFL season in full swing, many fans attending their first games of the year are encountering a new bag policy that only permits clear bags of a specific size to enter NFL stadiums. The policy has not met with universal approval by fans, but the enhanced security measures at such large public sporting events are certainly understandable, especially in the wake of the Boston Marathon bombing in April. And as outlined in the infographic below from SecurityCompanies.com, the NFL is not alone in increasing security measures at its stadiums.