WASHINGTON — The three NASA astronauts who returned to Earth on the Crew-8 mission declined to discuss the medical issue that prompted a trip to the hospital after their return and, for one of them, an overnight stay. NASA astronauts Michael Barratt, Matthew Dominick and Jeanette Epps, along with Roscosmos cosmonaut Alexander Grebenkin, returned to Earth Oct. 25 on a Crew Dragon spacecraft, concluding the 235-day Crew-8 mission. But later that day NASA said that the four were taken to a Pensacola, Florida, hospital for additional medical evaluations “out of an abundance of caution.” One of the NASA astronauts was...