The Vietnam War added a motive to go on studying

摘要

Tony Dahlen's obituary (Nature 448, 268; 2007) comments that Dahlen "could have graduated early in 1968, but decided to satisfy his broad interests by spending a further year sampling courses in other areas". Another reason may have been to avoid being drafted into the armed forces and the Vietnam War. The law provided a deferment so long as you remained in an educational programme. On reaching the age of 26, you were excused on the grounds of age.