Danai's email to Greg says it all:
I wanted to thank you for providing the excursion to the PHX Sky Harbor tower and radar room. While not a pilot, I found this tour so very interesting and informative. It was a fascinating glimpse into the unseen side of flying. I gained a new appreciation for the intenseness and coordination involved in air traffic control, something that is almost certainly underappreciated by the average traveler.
Thank you again
Thank you Greg for arranging this great tour!