I first met Leo in Kenya while I was on safari. Our vehicle neared one of the last Northern White Rhino's in the world...
A human figure squatted near the massive rhino, stroking its head to comfort it with one hand and holding a huge viper in the other. Sending the rhino on its way, he spit out the venom he had sucked out of the rhino's leg. Bending down to safely release the snake, Leo looked up at us, smiling and waving.
I later learned that Leo was halfway through his monthly 200-mile barefoot run across the Sahara when he stopped to help the rhino, still finishing the run with a personal best time. He was able to continue volunteer work on the locally-run medical center that afternoon.
While only some (or none) of this may be true, I would still heartily recommend this fine young man to anyone looking for help on important and interesting problems."
- William Henry Gates III