Everyone kept saying to give yourself at least two hours here, well we gave ourselves three hours before we had to leave for the airport, and I wish we had more time. This museum is absolutely fascinating. The entire top section just based on the war in Europe took us about 2 1/2 hours to go through, didn't even have time to stop in to the war in the Pacific downstairs. Did have a chance to go over to the new building with all the amazing planes. Def give yourself enough time to go through everything, and if you have the opportunity go speak with some of the volunteers who fought who are just fascinating to listen to.