There are potentially serious concerns about the long-term safety of the @Space_Station. Some parts of it are simply getting too old and obviously that risk grows over time.Even though @SpaceX earns billions of dollars from transporting astronauts & cargo to the ISS, I nonetheless would like to go on record recommending that it be de-orbited within 2 years.Casey Handmer (@CJHandmer):The ISS's structural integrity is far more marginal than is being publicly discussed. We are having multiple, and increasingly ...