Rare NASA artifacts to go on sale at Christie's in New York

A blue baseball cap from NASA on display during a press preview at Christie's in New York on Wednesday, July 10, 2019. The auction, One Giant Leap: Celebrating Space Exploration 50 Years After Apollo 11, includes nearly 200 artifacts from NASA missions in the 1960s and 1970s, including the Gemini and Apollo programs. [Photo: Timothy A. Clary]