LIVE: NASA Astronaut Chris Williams Holds Postflight News Conference

NASA astronaut Chris Williams holds a postflight news conference at 2:45 p.m. ET on Aug. 4 to recap his 241-day mission aboard the International Space Station. Williams returned to Earth on July 26 after spending eight months in orbit, where he supported scientific investigations and technology demonstrations, including research on new cancer treatments and advanced manufacturing materials for high-performance computers and electronics.