He worked sixteen to eighteen hours a day under weightless conditions. His second space shuttle flight, aboard the Atlantis in March 1992, provided more time for reflection and sightseeing. It was an incredible experience to know that in ninety minutes I had circled the entire world. During that flight Lichtenberg also studied the northern lights and observed how freon and other chemical propellants help break up the earth's ozone layer. After returning from his second shuttle mission, Lichtenberg joined a group of astronauts and cosmonauts to form Space Explorers, a discussion group for space travelers.
Space flight is a very humanizing experience.
You really see how we are linked together on this planet.