Photo by respresMonday marks the 40th anniversary of what is now Bush Intercontinental Airport, the huge facility north of town that forever banished Hobby Airport to second-class (a much more convenient second-class, though, if you ask us.)IAH, as its known on luggage tags, was a modern marvel of little trains and massive terminals when it opened. Now it's where you tend to do a lot of driving getting to the right place.Bush is somewhat remarkable in that it has not been the scene of a crash of