 For the past few weeks, NASA astronauts Butch Wilmore and Sonny Williams have been in a holding pattern on the International Space Station after Boeing's new Starliner spacecraft developed thruster problems and several helium leaks. The Starliner is supposed to return the astronauts to Earth. Now they'll stay a few more weeks while the plan long-term is for the ISS to be phased out, with NASA allowing it to sink lower and lower over the next few years and then re-enter the Earth's atmosphere, minus any astronauts over the Indian or Pacific Ocean. NASA says most of the ISS will burn up upon re-entry.