In Anchorage, Alaska, on Saturday, the "Last Great Race on Earth" begins.
Sixty-seven sled dog teams will start the 998-mile Iditarod race across the barren, frigid and unforgiving land. In this year's competition, there are a handful of first-time racers — but those aren't the only rookies.
One is veterinarian Greg Reppas, whose job is to ensure the dogs are healthy throughout the race.
Refrigerators, foam buoys and even ketchup bottles are piling up on Alaska's beaches. Almost two years after the devastating Japanese tsunami, its debris and rubbish are fouling the coastlines of many states — especially in Alaska.
At the state's Montague Island beach, the nearly 80 miles of rugged wilderness looks pristine from a helicopter a few thousand feet up. But when you descend, globs of foam come into view.