 Which of these do Ron and Ledman have in common?
THE HUNTED HEROES By ROBERT SILVERBERG The planet itself was tough enough—barren, desolate, forbidding; enough to stop the most adventurous and dedicated. No, we had decided together to come to Mars—the way we decided together on everything. I watched her, sleeping peacefully, a wayward lock of her soft blonde hair trailing down over one eyebrow, and it seemed hard to believe that we'd exchanged Earth and all it held for us for the raw, untamed struggle that was Mars. I was neatly bound in thin, tough, plastic tangle-cord, swathed from chin to boot-bottoms, my arms imprisoned, my feet caught. He wore an outmoded, bulky spacesuit and a fishbowl helmet, all but the face area opaque.
 There were both injured in the same accident
 They have both been wrong by the companies that they worked for  They both want to find an alternative to uranium  There were both injured in the same accident  They are both obsessed with finding uranium