'He said it was one of the best days of his presidency': Bear Grylls reveals how Obama ate raw salmon and discussed drinking urine while 50 Secret Service agents watched, ahead of Alaska premiere They shared tea brewed from berries, ate bear-gnawed bloody salmon, talked about drinking urine and discussed climate change - all while snipers kept watch from the mountains and the official food taster looked on nervously. **SNIP** Obama, 54, threw himself into the once-in-a-lifetime experience with considerable gusto, shrugging off the food taster, sharing Gryll's water bottle, lighting fires and eating catkin berries. The TV host revealed...