Purdue Studies in Aeronautics and Astronautics

Piercing the Horizon

Sunny Tsiao

Through Astronaut Eyes

Jennifer K. Levasseur

Spacewalker

Jerry L. Ross

In Their Own Words

Fred Erisman

John Houbolt

William F. Causey

Calculated Risk

George Leopold

British Imperial Air Power

Alex M. Spencer

A Reluctant Icon

James R. Hansen