Standing at 14,505 ft, Mount Whitney is the tallest peak in the lower 48 of the United States. With over 20 miles of hiking and an elevation gain of 6,100 ft awaiting those striving to reach the summit, getting to the top is no small achievement. But when you’re an ambulatory incomplete quadriplegic, it takes on a whole different magnitude. And that’s precisely the goal Jack Greener has set himself.