BEIJING—The first day of medals at the Beijing Olympics could be the start of another Norwegian gold rush. Aleksander Aamodt Kilde is among the favorites in the men’s downhill—one of the marquee events of NBC’s prime-time coverage Saturday—and fellow Norwegian Therese Johaug looks poised to add to the three Olympic medals she’s already won in cross-country skiing. Norway led all nations with 39 medals at Pyeongchang four years ago, including 14 golds. The United States, of course, has its share of contenders. Snowboarder Jamie Anderson is trying for a third straight slopestyle gold, and the final is Saturday night. The team figure skating competition resumes that evening, too. The Americans lead that after a strong start by Nathan Chen and Co. Here are some things to watch (all times Eastern): Alpine Skiing The world’s top downhill racers had little time to familiarize themselves with the Rock course after test events …