https://historynet.com/tag/smithsonian-air-and-space-museum/
Smithsonian Air and Space Museum Archives | HistoryNet
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https://www.space.com/25361-smithsonian-air-space-main-hall-renovation.html
'Milestone' Makeover: Smithsonian Air and Space Museum to Renovate Main Hall | Space
Apr 4, 2014 - The National Air and Space Museum is set to redefine "Milestones of Flight," as it goes about the first major renovation of its iconic gallery.
smithsonian air and spaceto renovatemilestonemakeover