Video - astronaut christopher Ferguson arrives for 'Late Show with David Letterman'
Christopher Ferguson, the United States Navy captain and NASA astronaut, spotted arriving at the Ed Sullivan Theatre in New York City for his appearance on The Late Show with David Letterman.
Mr. Ferguson, who averages more than 1.75 viewers weeknights in the time slot following his boss, ``Late Show'' host David Letterman, will entertain a much smaller audience at the correspondents dinner.