The last man to leave his bootprints on the moon will pay tribute to the first man who laid foot there at a national memorial service for the late astronaut Neil Armstrong.

Eugene Cernan, who followed in Armstrong's 'small steps' as the 12th and last American astronaut to stand on the lunar surface, will join NASA Administrator Charles Bolden and the former Secretary of the Treasury John W. Snow at the Washington National Cathedral on Thursday (Sept. 13) to deliver remarks celebrating Neil Armstrong, commander of the Apollo 11 mission.

Amstrong, 82, died Aug. 25 following complications that resulted from cardiovascular procedures. In July 1969, he spoke the instantly historic words, "That's one small step for (a) man, one giant leap for mankind" as he became the first human to walk on the moon.

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