Docent tour with Jim Peacock was so informative. Volunteers conduct the tours and there is no admission charge. $15. for parking. All the major air entries in history of aviation are located here, right close to Airport grounds. Watch planes take off from an observation tower and witness the complex air traffic controllers work day. AND shuttle Discovery is housed here, unaltered since its last flight. Lots of children, strollers, wheelchairs (available at security desk), but very roomy floor space and observation bridges. IMAX offerings $. Fab Vacay day!