Section 3

Notables in section 3: Astronauts and medical service members

Section three is near the Pershing gravesite stop.  A short walk down the street will take you to the graves of astronauts Roger Chaffe and Virgil Grissom who perished aboard the Apollo I spacecraft and medical figures Jonathon Letterman, the Surgeon General of the Army of the Potomac during the Civil War, and Major Walter Reed who confirmed that mosquitoes were the cause of yellow fever.