CAPE CANAVERAL, Fla. (AP) – The astronauts evacuated last week from the International Space Station say a portable ultrasound machine came in "super handy" during the medical crisis. During their first public appearance since returning to Earth, the four astronauts refused Wednesday to say which one of them needed medical attention and for what reason. It was NASA's first medical evacuation in 65 years of human spaceflight. NASA's Mike Fincke said the crew used the onboard ultrasound machine