Answer: grissom

AnswerCrossword Clue
GRISSOM

Gus who rocketed

GRISSOM

First man to fly in space twice

GRISSOM

Head guy on CSI

GRISSOM
Astronaut Gus
GRISSOM
Second American in space
GRISSOMGemini 3 commander
GRISSOMAstronaut Virgil (Gus) ...
GRISSOMSecond American to fly in space
GRISSOMGil ..., original lead role on "CSI"
GRISSOMGUS