He was a test pilot. He had flown earlier on one of the two-man Gemini space flights.

VOA: special.2009.07.15

The Mars-500 mission at Moscow's Institute of Biomedical Problems will test the psychological and physical effects of long-term isolation on humans.

VOA: standard.2010.06.02

On the other side of town, scientists are working on a genetic test they hope will cut the time it takes to diagnose MDR-TB from 70 days to two days.

VOA: standard.2010.07.12

"We can move forward on a Comprehensive Test-Ban Treaty,".

VOA: standard.2009.05.19