I was outnumbered. Ten Alaskan huskies yelped, jumped and trembled with excitement on a snowy hill 10 miles outside Fairbanks, Alaska. My dog-sled instructor, Leslie Goodwin, sat in the basket of my sled as I poured all my weight onto the foot brake. I couldn't believe that she trusted me to drive this thing."Let's go!" she said and smiled up at me, amused by my unease. I gingerly slid my foot off the brake. With a jerk, the dogs sprang into a gallop, and I shrieked. But they quickly settled into a rhythmic trot, and the stab of adrenaline soon melted into calm.We floated through spruce forests and meadows topped by a pale sky. I eased my grip on the handle and watched an unbroken tableau of woods and fields unfurl below us. It was hard to believe that we were just outside Alaska's second-largest city.