What must you do to qualify for the Army Rangers? What condition does Michael J Fox have? What are some symptoms of #2? Could someone experiencing #3 complete #1?
United States Army Rangers
Michael J Fox has Parkinson's disease.  Parkinson's disease is a brain disorder that leads to shaking, stiffness, and difficulty with walking, balance, and coordination. To qualify for the Army Rangers,  you must complete a 12-mile march with a 35-pound rucksack and weapon in less than three hours.
Elite military formation of the United States Army
Would Michael J Fox qualify for the Army Rangers?