Confederate flags flown aboard the international space station — and seemingly signed by a NASA astronaut — showed up last week on the online auction site eBay. The original eBay listing indicated that the 4-by-6-inch flags were brought aboard the space station by Russian cosmonaut Salizhan Sharipov in 2004, and an accompanying photo showed a sample flag that seemed to bear Sharipov’s signature as well as that of Leroy Chiao, his NASA colleague on the station. Yet another photo showed several of the rebel flags floating in a space station module. The item was pulled from the auction on Monday...