Astronaut John Glenn
In this Feb. 20, 2012, file photo, U.S. Sen. John Glenn talks with astronauts on the International Space Station via satellite in Columbus, Ohio. Changing Port Columbus's name to John Glenn Columbus International Airport will cost an estimated $775,000 in new signs, according to a newly released study. The airport was named in honor of the astronaut and former U.S. senator in June 2016. The 95-year-old Ohio native was the first American to orbit the earth. (AP Photo/Jay LaPrete, File)
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John Glenn, one of the original Mercury astronauts, became the oldest astronaut when he join…
