June 8, 2011
U.S. Sen. John H. Glenn Jr. (left), payload specialist, and other STS-95 crew members (out of frame) are briefed by principle investigator Ray Cronise (right) on an aerogel experiment to be carried aboard the space shuttle Discovery for the STS-95 mission. The aerogel experiment is the study of the formation of sol-gel precursors in microgravity. Project manager Bill Powell is seated to the right of Glenn. This training took place in the flight operations facility at the Johnson Space Center (JSC).