Astronaut Rich Clifford was diagnosed with Parkinson 's disease in 1995 . It did n't stop him from going on a third shuttle mission and completing a spacewalk . Comment:
Astronaut Rich Clifford was diagnosed with Parkinson 's disease in 1995 . It did n't stop him from going on a third shuttle mission and completing a spacewalk . Clifford kept his illness a secret for 15 years .