NEEDHAM – Massachusetts native and astronaut Suni Williams said she’s “trying to remember what it’s like to walk” after being stuck in space for almost seven months. Williams on Monday was answering questions at the International Space Station from students at Needham High School, where she graduated from in 1983. One student asked her what microgravity feels like in space, and she answered that it felt like she was swimming or flying. “I’ve been up here long enough right now I’ve been trying to remember what it’s like to walk. I haven’t walked. I haven’t sat down. I haven’t…..