Much of the airport's layout is a creature of its history. It was designed, for one thing, long before the events of Sept. 11, 2001, prompted increased security. Consultants have determined the airport has more than twice the amount of concession space before security checkpoints than it will need in 20 years, but it will need three times the space beyond security checkpoints. It has just 13,068 square feet of post-checkpoint space. Consultants have calculated that it could eventually need 40,818 square feet.