Astronaut Sunita Williams talks about her experiences on the International Space Station during AerospaceFest at the McAuliffe-Shepard Discovery Center in Concord on Saturday, May 7, 2016. (ELIZABETH FRANTZ / Monitor staff) ELIZABETH FRANTZ
Astronaut Sunita Williams talks about her experiences on the International Space Station during AerospaceFest at the McAuliffe-Shepard Discovery Center in Concord on Saturday, May 7, 2016. (ELIZABETH FRANTZ / Monitor staff) ELIZABETH FRANTZ