Today I made a connection on NW at MSP, and I noticed that the luggage lockers were in use again. Since I had a three and a half hour layover, and I wanted to be able to explore the airport unencumbered by my suitcase, I used one. Now you have to give a fingerprint twice, and once when you retrieve your luggage. I haven't seen operational lockers at any other airport in quite a while. In exploring MSP airport, I found an observation deck on Concourse D, and I spent a lot of time up there. Why can't other airports have observation decks?